Slashdot Mirror


Linux PCs Drive 74-Channel Pipe Organ

cyberman11 writes "According to the EE Times, Marshall & Ogletree LLC have created an electronic simulation of a classic Aeolian-Skinner pipe organ in the Trinity Church situated, just 600 feet from ground zero near the World Trade Center site in New York. The system consists of 10 Linux PCs that drive 74 Carver amplifiers and 74 Definitive Technology speakers, for a total of 15,000 watts."

265 comments

  1. classical pipe organs... by Anonymous Coward · · Score: 1, Informative

    ...don't have amplifiers or computers but usually do have >100 pipes.

    So this is a modern pipe organ?

    1. Re:classical pipe organs... by wmguy · · Score: 3, Interesting

      Agreed, this is by no means a pipe organ as the title of the post says, just a rather advanced electronic organ.

      A large pipe organ will have thousands of pipes, but looking back into the article it does not state that 74 pipes will be represented, but 74 audio channels and therefore 74 speakers.

      That would explain the large amount of computing power needed, you have to receive the input, and quickly retrieve/generate enough audio data to represent potentially thousands of pipes in 74 independent audio channels.

  2. 21st century meets 15th century by downix · · Score: 5, Interesting

    The scary part here is the pure mathematics found on both ends of the spectrum. A classic pipe organ is a mathematical marvel, much like the computer of today. (I did a paper once on the mathematics of musical instruments, more focused on the Violin, but I made note of the pipe organ as well)

    The elegance and simplicity of such ancient instruments from the "Enlightenment" period cover up the true genius it took to design and develop them.

    --
    Karma Whoring for Fun and Profit.
    1. Re:21st century meets 15th century by Anonymous Coward · · Score: 1, Insightful

      From a theoretical standpoint, analysing as a one-off then musical instruments are works of genius... but they were not created as one-offs with no history. You can blow air into bottles (or pan pipes) and have your own instrument... hook up some interaction and you have a keyboard. The human ear is very musical... it is pleasurable to hear harmonies etc so the instruments get tuned to a pleasurable key.

      Give or take a few hundred or thousand years and you have something which is 'genius' if a one-off but really the result of generations of trial-and error, rather than genietic production.

  3. Bad publicity for Linux by Anonymous Coward · · Score: 1, Funny

    If you need 10 boxen to drive 74 things.

    1. Re:Bad publicity for Linux by BakaMark · · Score: 1

      Heh, you might hare required more Windows boxes to acheive the same thing. Besides they put them aside because they claimed that they were unreliable.

      The main issue might have been the fact that each of the 74 voices being generated had to have their own channel. There is a limit to how many soundcards you can jam into a physical computer and how many channels in your "high-end" sound cards. Not to mention that they were working with recordings that were gigabytes in size.

    2. Re:Bad publicity for Linux by Razor+Blades+are+Not · · Score: 2, Funny

      Yeah - but if they want it really loud, they have to add another one.
      Cause, like, then it would go up to eleven.

    3. Re:Bad publicity for Linux by Anonymous Coward · · Score: 0

      One louder.

    4. Re:Bad publicity for Linux by Anonymous Coward · · Score: 2, Insightful

      I use a java pipe-organ on my own computer (a Windows XP box) and it does very limited polyphony. Maybe 25 tones at once. I know, 10 fingers doesn't make 25 notes, but imagine how much more complex it is when you've got all those different stops, all of which must play for every single note. For the 'Grand Orgue' manual, for instance, there are 22 stops. If I enabled the whole thing, I would be able to play one note with all the stops. Start laying down fingers, and you start losing timbres. By the time I've played a Bach-esque chord using all ten fingers, I've got some odd honking and maybe a bourdon playing, while the rest of the stops have been lost.

      On a real instrument, that single manual, with 61 keys and 22 stops, has 1,342-note polyphony. Every single pipe and reed can play with every other pipe and reed, all the time. If those 74 stops were coupled to the same 61-key manual, the 10 Linux boxen would need to have 4,514-note polyphony, or 450 notes each, to have the same versatility as the original instrument. Considering my computer, working with existing sounds rather than physical modelling, can only do 20 or 30 note polyphony, I'd say it's a damn good advert for Linux!

    5. Re:Bad publicity for Linux by alannon · · Score: 2, Interesting

      Remember that a real organ has a limited amount of air to work with. Yes, an organist can make a chord of 12 with 10 fingers and two feet, but if you are trying to pump a limited number of air through a massive amount of different air channels, how many of them do you think will actually resonate enough to make any noise?

    6. Re:Bad publicity for Linux by Anonymous Coward · · Score: 1, Interesting

      Some organs do actually have amazingly large pumps for air.

      Here's an example of one that might be able to do the job.

      Granted, it is one of the world's largest organs, so it's a bad example, but anyway check out the MP3 sample of the conclusion of the Liszt piece. Awesome!

    7. Re:Bad publicity for Linux by Herstal · · Score: 1
      This seems similar to another

      project.

      It doesn't run on Linux but will work on one box.

      --
      Time is relative like Incest.
    8. Re:Bad publicity for Linux by Anonymous Coward · · Score: 0

      I don't think they needed 10 processors, but did need a lot of PCI slots for the professional sound cards to drive each channel.

    9. Re:Bad publicity for Linux by jazman · · Score: 1

      I worked for a pipe organ builder as a holiday job for a few months.

      Um, all of them. That's part of the design of the organ - making sure that the blower is capable of supporting the largest possible chord the organist can play. If that means all stops, all couplers, no duplicated notes (e.g. middle C on manual 1 and middle C on manual 2), then for a massive organ you're going to get an equally massive blower. Even the largest organ has a limited amount of air to deal with, but that is always enough to support what the organ can theoretically pump out. Any organ builders that didn't equip their organs will large enough blowers would soon be found out and equally rapidly go out of business (unless it was specced out that way, which is unlikely - just about the first thing an organist does on the commissioning of a new organ is yank out all the stops and see if he can blow the church roof off and it would be immediately obvious if the builder had only done a half-arsed job).

      Wow, just listened to that Ad Nos sample. Amazing. Just as you think it can't possibly get any bigger, it does exactly that. Several times. Stunning. That extra bit on the top of the last note - blimey.

  4. I can see the advertising slogan now... by Anonymous Coward · · Score: 5, Funny

    Linux: Perfect for playing with your organ

    1. Re:I can see the advertising slogan now... by Botunda · · Score: 1

      Isn't playing your own organ a prerequisite to being on /.?

      Sorry. No sig cause my posts suck too much

    2. Re:I can see the advertising slogan now... by Pyroja · · Score: 3, Insightful

      Actually, these kinds of applications can be greatly interesting to musicians. It may seem a funny concept to use a computer to play an organ, but one of the best applications me and my dad found for his old 450mhz system was installing a VST Organ synth on it so he can bring it along on gigs, and it sounds better than any hardware he ever bought. If I could've set that system up using Linux, I would've done it in an instant. It's these things I'd like to see implemented in Linux to make it usable for yet another great selection of potential users.

      --
      [Trojan.]
    3. Re:I can see the advertising slogan now... by Spunk · · Score: 1

      Tie it in with IBM's "Linux is a little boy" campaign...

      What did you teach him??

    4. Re:I can see the advertising slogan now... by Stephen+Samuel · · Score: 1

      I was thinking:
      Linux: For the best in sound development methodologies.

      --
      Free Software: Like love, it grows best when given away.
    5. Re:I can see the advertising slogan now... by spacecowboy420 · · Score: 0, Troll

      If it takes 10 boxes to play a pipe organ, how many does it take to play a skin flute?

      --
      ymmv
    6. Re:I can see the advertising slogan now... by Anonymous Coward · · Score: 0

      One at a time, of course.

    7. Re:I can see the advertising slogan now... by B3ryllium · · Score: 1

      Uh, what OS were you using, then? BeOS?

  5. Like a local newspaper... by Tofino · · Score: 0, Troll
    These posts always remind me of my local newspaper, the Surrey Now! There's always at least one cover story, and SEVERAL inside, of things that are utterly unnewsworthy, except that they happened in Surrey. Such as:

    "Krispy Kreme outlet to open in Surrey!"

    "Bif Naked practices with her band in Surrey!"

    Now if only they could find a 74-channel pipe organ in Surrey. It would be the SLASHDOT-SURREY-NOW~! crossover!

    1. Re:Like a local newspaper... by afree87 · · Score: 1

      You mean a 74-channel pipe organ in Surrey running Linux.

    2. Re:Like a local newspaper... by Anonymous Coward · · Score: 0

      It has to be in context. How many miles to Reading is that?

    3. Re:Like a local newspaper... by Anonymous Coward · · Score: 0

      oh yeah, *everybody* is making organ simulations on Windows these days, so it's pretty cool that finally somebody used Linux ... WTF??

    4. Re:Like a local newspaper... by B3ryllium · · Score: 1

      They should just run "Car Stolen in Surrey" as the permanent cover story, and be done with it. They don't even need the extra crap. :)

      They could print 24 or more "different" issues each day, one for each car stolen that day.

    5. Re:Like a local newspaper... by Tofino · · Score: 1
      I'd mod this down as a troll, but I can't see my mouse under the graffiti... :)

      I'm so proud... my first 0: troll! :D

  6. hrm... by xao+gypsie · · Score: 3, Funny

    reminds me of my friend who wanted to put a fork in a blender. he did this by connecting the blender to a serial cable wired to the various speeds, and then wrote a simple linux driver to control it. had his sister ssh into his box while he wasnt in the room, and boom.....buh bye to the fork. i would post a picture of the setup on my webserver, but at the offchange it gets /.ed, i will refrain. i dont think my roommates would like me killing their internet, and it would be hard to explain...

    xao

    --


    xao
    http://TheHillforum.hopto.org
    1. Re:hrm... by Anonymous Coward · · Score: 1, Funny

      Hey that sounds like a great /. story. You should really submit it. Just mirror your friend's site first. Then when it's accepted wait a week or two and submit it again. It'll make a great dupe.

    2. Re:hrm... by Anonymous Coward · · Score: 0

      Is it just me, or does this really not make any sense at all?

    3. Re:hrm... by cerebralpc · · Score: 1

      gross...your friend was forking his sister. Isn't that illegal!

  7. Cryptonomicon by Evil+Pete · · Score: 4, Interesting

    The first thing I thought when I saw the item was of the organ/computer in Cryptonomicon. Aside from that a very creative mix of old and new tech.

    --
    Bitter and proud of it.
    1. Re:Cryptonomicon by Anonymous Coward · · Score: 0

      +3(Stephenson reference)

    2. Re:Cryptonomicon by Leebert · · Score: 3, Interesting

      Funny, first thing I thought of was Don Knuth.

    3. Re:Cryptonomicon by Evil+Pete · · Score: 1

      Amazing. Many thanks. I didn't realise that about Knuth. Now we know who the Waterhouse character is based on. Makes me think I should read The Art of Programming properly and not just read chunks here and there (otherwise I would have known about his organ interests).

      --
      Bitter and proud of it.
  8. guess they... by 0x12d3 · · Score: 5, Funny

    Didn't like the BSD logo

    1. Re:guess they... by Anonymous Coward · · Score: 0

      I guess their secret sex fantasies was more realized with the penguins.

    2. Re:guess they... by Anonymous Coward · · Score: 0

      "Didn't like the BSD logo"

      That shouldn't stop them.

      Paul Klipsch used to make good money selling Heresy (tm) speakers to churches.

    3. Re:guess they... by Anonymous Coward · · Score: 0

      Yeah, but I bet he didn't sell any to Orthodox Churches!!!

  9. OK by Anonymous Coward · · Score: 3, Funny

    A local church built a new sanctuary. They moved their very fine old pipe organ from to the new sanctuary.

    It was an intricate task that was completed successfully. The local news heralded, . . . "St. Paul Completes Organ Transplant."

  10. Aaahh.... by Mr2cents · · Score: 4, Funny

    Is this thing on sourceforge yet? freshmeat? Or is it just a scheme to lur geeks to church?

    --
    "It's too bad that stupidity isn't painful." - Anton LaVey
    1. Re:Aaahh.... by Anonymous Coward · · Score: 0

      Sure, it's a plot to get geeks to go to church. Remember, the girls (women, you stupid geek) that show up in church are usually stone-cold sober, and a few, (well, more than a few) are good looking. None of this "Before 6 beers, After 6 beers" stuff with these galz.

  11. Gound Zero by Anonymous Coward · · Score: 1

    If I hear this stupid CNN coined phrase one more time I'm going to puke all over my shorts.

    1. Re:Gound Zero by fenix+down · · Score: 4, Informative

      Actually, it was coined by the New York Times. The guy who wrote the article about the Nagasaki bombing back in '46 added "ground" to the "zero" that they put at the middle of the maps they handed out to the reporters about the projected damage to make it sound like he was all "embedded" and shit. Talking about lighting-filled clouds rising thousands of feet above "zero" sounds kinda stupid, though, so he changed it to "Ground Zero" to make it sound more dramatic and jargon-y.

    2. Re:Gound Zero by Call+Me+Black+Cloud · · Score: 0, Offtopic

      Ground zero.

    3. Re:Gound Zero by Anonymous Coward · · Score: 1, Interesting

      Actually, IIRC, the term was coined by the atomic scientists on the Manhattan Project to refer to the epicenter of the first atomic detonation at Trinity Site in New Mexico.

    4. Re:Gound Zero by Uatu · · Score: 1

      ...about the Nagasaki bombing back in '46 added...

      Actually it was December 9, 1945 ... IIRC

      I'm not anal-retentive, but this is the way things begin to go bad: not remembering things correctly...

      Interesting history bit this "Ground Zero" thing, BTW

    5. Re:Gound Zero by Anonymous Coward · · Score: 0
      Actually it was December 9, 1945 ... IIRC

      You're at least closer than the 1946 reference, but it was August 9, 1945.

    6. Re:Gound Zero by Igmuth · · Score: 1

      Well actually, It was August 9, 1945. (according to here.

    7. Re: Gound Zero by Anonymous Coward · · Score: 0

      Hiroshima - 1945 Aug 6
      Nagasaki - 1945 Aug 9

      Ground-Zero Cafe is in the center courtyard of the Pentagon.

    8. Re:Gound Zero by jackbird · · Score: 2, Interesting

      Actually, it was coined by the New York Times.

      No, it's an actual technical term that refers to a useful concept when discussing the effects on the ground of air-burst explosions.

      From The United States Strategic Bombing Survey The Effects of Atomic Bombs on Hiroshima and Nagasaki Chairman's Office, 30 June 1946:

      For convenience, the term "ground zero" will be used to designate the point on the ground directly beneath the point of detonation, or "air zero.")

    9. Re:Gound Zero by Uatu · · Score: 1

      Thank God!

      I writed the wrong date hoping someone would read it and correct me.

      I always thought that if someone around here corrected another one with some kind of assuredness, "everyone" would take it for granted. As in when people believes something only because it's printed on paper.

      There's still hope.

      I know this is off-topic, but don't you hate it when people talk without "enough" knowledge of something ?

      I think this is one of the main reasons there's all these conflicts around the world.

      Peace.

  12. Beware Parent link by penguin+king · · Score: 2

    Beware the above link is probably not suited for children or parents/anyone else that may be seated with or standing behind you. In fact the faint hearted may be disturbed by it.

  13. Check this out by Anonymous Coward · · Score: 3, Interesting

    24/7 streaming organ music. The internet truly has something for everbody.

    1. Re:Check this out by Anonymous Coward · · Score: 0

      On a related note: this will have you in stitches.

      The internet truly does have something for everybody, I agree.

    2. Re:Check this out by jhantin · · Score: 1

      More like someone needing stitches, methinks... then again, it is the month of Dismember.

      --
      ...when you're writing a game...tweak the difficulty of "Easy" to something [your mother] can cope with. -- onion2k
  14. Is it the same as the real thing? by MagicDude · · Score: 5, Interesting

    Quite impressive yes, but there are just some things that can't be accurately recreated by technology, and musical instruments as grand as this are some of them. You can recreate the sound of a single pipe yes, but you can't recreate the ambiance and neuance that comes from having an entire pipe system in place. Pipes can resonate when similar notes in different octives are played, which adds different timbres and depth to the sound. Also, now that there aren't vast cavities in the well where the pipes used to be, or the wall cavities are filled differently, the sound will bounce around differently and give a different sound than what was originally thre. This is something that a computer can't really recreate or compensate for, as even humans don't quite understand how sound works all the time (Look at the Troy Savings Bank Music Hall in Troy NY, engineers and architects are still doing tests to see why a 150 year old music hall got some of the best acoustics in the world entirely by accident.) It's a great marvel, but it's not the same.

    1. Re:Is it the same as the real thing? by addaon · · Score: 1

      You make the common mistake of assuming that "can't yet" is the same as "can't".

      --

      I've had this sig for three days.
    2. Re:Is it the same as the real thing? by Anonymous Coward · · Score: 0

      you could record samples of the instrument under all possible combinations of input. hehe, how many keys and pedals are there...>O(2^N) would be a long time

    3. Re:Is it the same as the real thing? by Anonymous Coward · · Score: 0

      no, you make the even more common mistake of thinking that everything is possible given enough time and technology.

      it isn't.

      Some things will always be beyond reach -- wise people learn to see that as a good thing.

    4. Re:Is it the same as the real thing? by BaldingByMicrosoft · · Score: 3, Insightful

      Thing is, what you're bringing up isn't about digital replacement -- it's about any replacement. Even if they build another pipe organ as closely as they can to the original, it won't "accurately recreate" the sound of the original.

      It would be interesting to hear the opinions of people who have actually heard it and have better hearing than me 8^)

    5. Re:Is it the same as the real thing? by addaon · · Score: 1

      Some things are very likely beyond our capability, forever. Simulating a few tin cans and a couple tons of hot air ain't one of them.

      --

      I've had this sig for three days.
    6. Re:Is it the same as the real thing? by Anonymous Coward · · Score: 0

      There is not a single mic+studio monitor chain in the world that can convincingly replicate the sound of the human voice. It's obvious which is the human, and which is the playback. Why do you think a big PA+sampler will sound just like a pipe organ?
      Bet it's louder than the original though. :(

    7. Re:Is it the same as the real thing? by _aa_ · · Score: 1

      We'd all like to think that the human ear is the epitome of listening devices in the world. Unfortunatly, at least biologically speaking, it is mediocre at best. Through thousands of years of trial and error we have managed to maximize our auditory system's capabilities, but when you get down to it, most people can't distinguish 440Hz from 441Hz, 9dB from 10dB, 120BPM from 121BPM, C# from D, violin from a viola, or the beatles from the monkeys.

      Perhaps that last one is a stretch. But still, most people's ears and minds just can't do it, and those that can are rare. For the rest of us, we invent meters, visualizations, tuners, amplifiers, and countless other devices that show us what we can't quite hear.

      I find it difficult to believe that a human being could hear a difference as subtle as the absence of pipes in wall cavities in an environment filled with hundreds of breathing, coughing, sneezing, crying, singing organisms. Certainly the presence and absence and arrangement of the church-goers has a more significant impact on the accoustics of the environment. I'm sure some out there will contend that they can detect such differences, and I don't doubt that a slight some can. But I'm certain that the visual image of seeing an old pipe organ removed and a new one installed is the root cause of the percieved accoustic anomalies.

    8. Re:Is it the same as the real thing? by B3ryllium · · Score: 1

      Finally! A real use for the Earth-Simulator. Or maybe ASCI Q would be better suited?

      And why can't the supercomputers have more intense names?

    9. Re:Is it the same as the real thing? by B3ryllium · · Score: 1

      "Hey Hey We're the Beatles, We Just Love Eating Dung!"

    10. Re:Is it the same as the real thing? by Anonymous Coward · · Score: 0

      We'd all like to think that the human ear is the epitome of listening devices in the world. Unfortunatly, at least biologically speaking, it is mediocre at best.

      Actually, mammalian ears in general are incredibly good compared to any other animal.

    11. Re:Is it the same as the real thing? by sasami · · Score: 1

      most people can't distinguish 440Hz from 441Hz, 9dB from 10dB, 120BPM from 121BPM, C# from D, violin from a viola, or the beatles from the monkeys

      Actually, your last example is quite correct. Prior knowledge of both the Beatles and the Monkees is required to tell them apart. The same goes for cheeses, coffees, timbres, and pitches. In fact, the ability to comprehend normal speech implies pitch sensitivity that's finer than the half-step between C# and D. The main problem is that people don't know what a C# is and how it differs from a D.

      Of course, some people may find that age prevents them from learning certain such skills, but that's altogether a different thing.

      ---
      Dum de dum.

      --
      Freedom is not the license to do what we like, it is the power to do what we ought.
  15. Oh man, not again by faust2097 · · Score: 4, Interesting

    Hey guys, guess what?

    Wattage has no direct bearing on the loudness or audio quality of a system!

    Now I'm sure that this is a pretty boomin' artificial pipe organ these guys have built but this focus on wattage in consumer electronics must stop. It's like saying that the car engine that uses the most gas or revs at the highest speed is the most powerful while ignoring all other relevan statistics.

    I hope you guys enjoy your eleventy-billion watt multimedia systems with 1% THD.

    1. Re:Oh man, not again by Anonymous Coward · · Score: 0, Funny

      You're only saying that because your LIMP WRISTED stereo probably doesn't do much more than 1000 Watts max. Fuck, my car stereo is 5000 watts alone, and kicks ass. You also probably drive a Honda, rather than a Lexus, like me. Wimp.

    2. Re:Oh man, not again by Anonymous Coward · · Score: 0, Funny

      Whoever moderated my post down is ALSO a limp wristed loser who probably drives a Toyota. Don't like it? BITE ME!

    3. Re:Oh man, not again by agentZ · · Score: 1

      Yes, but this one goes to eleven.

    4. Re:Oh man, not again by HermesHuang · · Score: 1

      They're did at least mention they're using Carver amps. While they didn't specify which variety, in general Carver makes very good amps. Sure, the wattage is what most people see, but at least to someone who really enjoys sound systems (and probably has spent way too much money on one) the name of the amp maker is probably more important.

    5. Re:Oh man, not again by fintler · · Score: 2, Informative

      1% is if you're lucky

      the new sony dream system and the new panasonic system both have 10% of THD. but they're 600watts tho so people will still buy them.

      THD, along with wattage are still only small factors in the sound a speaker puts out. materials used to make the cone, sensitivity, and resistance influence the sound enough so that your ear can actually tell the difference.

      This is pretty much why bose doesn't publish the specs for their speakers. they have great marketing, but their speakers are CRAP. Most bose speakers have an eq in that completely elimanates all the sound that the speakers just can't take....bose still uses paper cone speakers and foam in their "bass modules" (they ain't subwoofers, they're only 5 & 1/4in speakers, subwoofers start at 8in). The foam dry rots after a few years and you're left with a crappy set of overpriced speakers that throw away most of the sound.

    6. Re:Oh man, not again by Ion+Berkley · · Score: 1

      Wattage on the other hands has a direct effect on the elctricty bill of the church....15KWatts of power amp eh?? I wonder which is cheaper to run?

    7. Re:Oh man, not again by Anonymous Coward · · Score: 0

      Hopefully you are being funny, but on the off chance you are not, I hope you realize that all Lexus's are basically Toyota's with a more refined body. You see, Lexus is owned by Toyota. The ES300 is basically a Corolla that looks nicer. Owned.

    8. Re:Oh man, not again by Anonymous Coward · · Score: 1, Funny

      Yes but this is *pipe organ* they're trying to model, not a mini hifi system. It does take a lot of power to create truly impressive SPL.

      Of course watts in consumer electronics is quite another thing, it's even more useless than MHz.

      Have you read the fine print on a pair of PC speakers? "60W PMPO, 0.5W RMS" nice...

    9. Re:Oh man, not again by EverDense · · Score: 1

      Yes, I was going to ask if that was 15,000 watts peak RMS,
      or peak 15,000 watts Bruce Perens.

      --
      http://jesus.everdense.com/
    10. Re:Oh man, not again by spicedhamhawg · · Score: 2, Interesting

      15,000 watts sounds like a lot, I know (OK, it is a lot), but have you ever been close to a large pipe organ? They are *loud*! I truly doubt that 15,000 watts divided over 74 channels is excessive for the task. To do the job, they needed to not only reproduce the sound of the organ as closely as possible, but also reproduce the volume.

    11. Re:Oh man, not again by rcotran · · Score: 1

      The ES300 is based on the Camry chassis, not the Corolla.

    12. Re:Oh man, not again by Anonymous Coward · · Score: 0

      well ok i wasn't that far off. not bad for making it up off the top of my head huh? i wasn't even sure there was an es300. that's the low end lexus right?

    13. Re:Oh man, not again by AstroDrabb · · Score: 1

      Any good links for a budding audiophile to read up on this stuff? Especailly what is THD, the best cone material, etc.

      --
      If Tyranny and Oppression come to this land,
      it will be in the guise of fighting a foreign enemy. -James Madison
    14. Re:Oh man, not again by operagost · · Score: 1

      I wouldn't say subwoofers start at 8" as a rule, myself. I believe I have seen 6.5" subwoofers. Naturally the power handling is quite low, but the diameter of the sub isn't really the specification of concern- it's the travel. I think it's offically called "displacement" or Xmax.

      --

      Gamingmuseum.com: Give your 3D accelerator a rest.
    15. Re:Oh man, not again by Kiryat+Malachi · · Score: 1

      Hey, guess what?

      Wattage DOES have a direct bearing on the loudness of the system!

      Double your wattage, you get a 3 dB increase in output, or roughly a 1.4x increase in intensity. However, since hearing is logarithmic, to get the same increase in apparent loudness, you need to double your wattage again.

      Now, it is true that amplifier wattage is not the only important thing; acoustic conversion efficiency of the speaker (the percentage of electrical input that becomes acoustical energy, usually a very poor ratio) and acoustics of the space are important too.

      Still, wattage does indeed have a direct bearing on the loudness of a system.

      I make no claims for its bearing on quality, because there is NO direct correlation there at all.

      --

      ---
      Mod me down, you fucking twits. Go ahead. I dare you.
      (I read with sigs off.)
    16. Re:Oh man, not again by ImpTech · · Score: 2, Funny

      I agree in spirit, but I defy you to make a quiet 15000W system. I bet you can't even burn all that power on a resistor quietly!

    17. Re:Oh man, not again by c_oflynn · · Score: 1

      Reminds me of a usenet post:

      "Remeber, watts = volts X amps. Unless you are in the amplifier business, in which case it always ends up being 200 watts or more no matter what"

    18. Re:Oh man, not again by Anonymous Coward · · Score: 0

      Carver amps?! "Very good"?!

      Step away from the crackpipe, sir.

    19. Re:Oh man, not again by Anonymous Coward · · Score: 0

      If you put 15,000 watts into a system, it dosen't necessairly mean you're going to get 15,000 watts in sound. It's called efficency. Since they're using good amps, and good speakers, there's no doubt that the efficency of the system is going to be very high, and that it'll be freaking loud!

      But, in consumer electronics, he does very much have a point. Some of that shit sucks, and the wattage listing shouldn't be trusted.

    20. Re:Oh man, not again by quist · · Score: 2, Informative

      good amps, and good speakers, there's no doubt that the efficency of the system is going to be very high,

      In tweak gear--esp. speakers--efficency is lower. This is due to optimizations to gain linearity. Practical electro-magnetic systems are dreadfully nonlinear; to flatten the curves, power is wasted. what it is.

    21. Re:Oh man, not again by donweel · · Score: 1

      I have found this site (www.uhfmag.com/) to be quite informative on matters pertaining to audiofilia. The reviews are honest and unbiased. The articles help you to understand what makes good sound and how to glean fact from fiction. I have bought equipment based on thier recomendation and been very satisfied. You can also get components and somtimes audiofile recordings from thier store.

      --
      Many a long talk since then I have had with the man in the moon; he had my confidence on the voyage. Joshua Slocum
    22. Re:Oh man, not again by quintessencesluglord · · Score: 1

      So instead of a preoccupation with wattage, consumer electronics should have a preoccupation with THD? ;)

      Um, wattage can also denote the quality of the dynamic range of a system. It's not specific only to "loudness", although more watts and things get louder.

      Convey the dynamic extremes of a symphony (or pipe organ) with only 10 watts, can't be done (unless you are using extremely efficient speakers). Ever hear a organ go from a single tone to feeling the floor rumble in a church when it really kicks in? That's moving a lot of air. It's visceral and can't really be conveyed with low power.

      1% THD is perfectly acceptable given what a system was designed to do (are you trying to move a lot of air or hear a perfect square wave... everything is a compromise).

      Specs confirm what a person hears, not the other way around (systems with nearly identical specs can sound vastly different). 100 watts can sound just as crappy as 500. Just not as loud.

    23. Re:Oh man, not again by Anonymous Coward · · Score: 0

      Funny, I was just thinking that with 80 channels, 15,000 watts is really NOT a lot of power[1]. This is less than 200 watts per channel. In a live sound application where you are trying to reproduce the bass from a HUGE 15-foot (or taller) pipe whose job is to make a big strong standing wave, this may not be enough to make the requisite noises loudly enough and without clipping.

      Of course, it all depends on how they did it. It said they have subs, so maybe 10,000 watts are going there, which might be about the right amount. Of course, you've got to realize that in a room that seats hundreds, 10,000 watts is not the huge amount of power that it sounds like. My church has probably about 15,000 watts in QSC amps, and all we're trying to reproduce is the bass from a bass guitar and a kick drum, IMHO a much easier task than producing the sound of a proper organ.

      [1] Because the spatial effect is part of the fun of an organ, I'm assuming they have lots of different speakers scattered in lots of different places where the pipes used to be. In other words, I am assuming they run something like 80 separate speakers. However, I could be wrong. Maybe they're mixing it beforehand and only running it a much smaller number of speakers. Neither alternative is that great: 15,000 watts spread across 80 channels may be underpowered. Something like 4 or 10 channels will not give the same spatial effect as the pipes did. (If you can't relate to this, try sitting in a choir loft that is literally surrounded by pipes.)

    24. Re:Oh man, not again by radish · · Score: 1

      The thing about bass is it suffers from the ol' inverse square law very badly. If I remember rightly from physics class (and please correct me if I'm wrong), the sound volume coming from a speaker goes down exponentially with both frequency and diameter. So you can get 50hz out of a 1" cone, but only very very quietly. To get low freq at any appreciable volume requires either a massive amount of amplification (read power, distortion and travel) or a big cone.

      Hence why you can still get decent bass from a pair of in-ear phones, but if you hold them a couple of inches away all you can hear is treble.

      --

      ---- Den ene knappen er powerknapp, den andre er Bender voice knapp "Bite My Shiny Metal Ass"

    25. Re:Oh man, not again by radish · · Score: 1

      *shudder* Bose. Those guys should get some kind of marketing award. How to sell total crap for insane prices and make people think they're getting a good deal. Those WaveRadio things they make - a clock radio with a CD player. You can get them from Radio Shack for $50. The Bose ones cost like $400 or something insane. I've heard them a lot (I travel on business and most of the hotels I stay in have them) and they sound truly dire. Thin, muffled, no image whatsoever - exactly what you'd expect from a clock radio with a CD player built in.

      --

      ---- Den ene knappen er powerknapp, den andre er Bender voice knapp "Bite My Shiny Metal Ass"

    26. Re:Oh man, not again by Anonymous Coward · · Score: 0

      Maybe if you use stove elements as the load.

    27. Re:Oh man, not again by Anonymous Coward · · Score: 0

      low-end Lexus is IS200, no idea what is it based on - probably nothing, it's built from scratch as a Lexus. btw: what's the plural of Lexus? Lexus'?Lexuses? Lexii???

    28. Re:Oh man, not again by adrianbaugh · · Score: 1

      Or, for speakers attached to a linux box: 120 BogoWatts, 60 Watts PMPO, 0.5 Watts RMS :-)

      --
      "'I pass the test,' she said. 'I will diminish, and go into the West, and remain Galadriel.'"
      - JRR Tolkien.
  16. But did they use mathematical models? by mongbot · · Score: 2, Interesting
    It didn't go into much detail as to how they were actually simulating the organs:
    Sorting out which transients contributed to a qualitative sense of realness-- to a master organist -- was a job that only an experienced player could hope to achieve. Late nights and many samples led to a collection of proprietary techniques for combing the transients out of a recording and ordering them for reproduction.

    So I think they just stuck to the attack/hold/release model and used extensive and clever sampling. A proper mathematical model would probably have require too much processing power even with 10 PCs, Linux or not.
    1. Re:But did they use mathematical models? by Anonymous Coward · · Score: 5, Interesting

      "A proper mathematical model would probably have require too much processing power even with 10 PCs, Linux or not."

      Very true...I can say for sure that to model even a single resonator on 10 pc's in realtime, you would have to make some drastic mathmatical simplifications and you would probably miss many sounds that an musician would notice. If you don't make those simplifications and try to model the physics exatly with complex geometires and all the nonlinear effects, it is impossible to do it in realtime and you are back to using recorded samples, only now the authenticity of your model is still in question.

    2. Re:But did they use mathematical models? by Anonymous Coward · · Score: 0

      "all models are wrong, some are useful"

      -prof. george box

    3. Re:But did they use mathematical models? by Alsee · · Score: 1

      processing power

      Good idea, lets do a power breakdown:

      The system consists of 10 Linux PCs that drive 74 Carver amplifiers and 74 Definitive Technology speakers, for a total of 15,000 watts

      74 Speakers: 1800 watts
      74 Amplifiers: 1100 watts
      10 CPU's: 12,100 watts

      -

      --
      - - You can't take something off the Internet! That's like trying to take pee out of a swimming pool.
    4. Re:But did they use mathematical models? by torpor · · Score: 1


      There is no such thing as an accurately modeled resonator.

      You can model its material properties, ad infinitum, as many ways in the world as there are to induce an object to resonate.

      The point of 'modeling' is that it is an analog, not a copy, and can therefore be scaled across infinite formulae and/or hardware implementations ...

      --
      ; -- the corruption of government starts with its secrets. a truly free people keep no secrets. --
    5. Re:But did they use mathematical models? by Firethorn · · Score: 1
      Definitive Technology (Owings Mills, Md.) was chosen for the speakers that would give voice to the organ manuals. Massive subwoofers would be used in tandem with the Definitives -- the signal split by low-pass and high-pass filters-for the deep notes played from the organ pedals. Each speaker would be driven by its own Carver power amplifier -- a total of 15,000 watts.


      1,800 watts/74 speakers = 24 watts each. Not realistic.
      12,100 watts/10 computers = 1,210 watts each. I don't know of any servers that take this much juice. A 550 watt PS is a large one.

      A pipe organ would take a huge amount of power to immitate accuratly, seeing as how it has massive range (from almost ultra-sonic to "was that an earthquake?") and massive power (can be heard about equally everywhere in a large building).

      It's a unique experience to hear one played. The lower tones (below hearing, but you can _feel_ them) add a large amount of impact, properly done.
      --
      I don't read AC A human right
    6. Re:But did they use mathematical models? by Alsee · · Score: 1

      Humor. A 1,210 watt CPU would heat a small home. Ten 1,210 watt CPU's would melt a steel computer rack.

      -

      --
      - - You can't take something off the Internet! That's like trying to take pee out of a swimming pool.
  17. Obligatory.... by the_argent · · Score: 1

    They like it loud, do you know?

    1. Re:Obligatory.... by Rimbo · · Score: 1

      This one goes to eleven.

  18. Re:omfg by Anonymous Coward · · Score: 0

    What I want to know is who measured the distance as exactly 600 ft. from Ground Zero and why.

  19. not a "pipe organ" by CoughDropAddict · · Score: 4, Informative

    Hate to point out the obvious, but without pipes it's not a pipe organ. In organ circles, these are known as "electronic" organs (crazy jargon, I know).

    Looks like an interesting project though. Electronic organs have never sounded remotely as good as the real thing (and they've been making them since the 60s at least). For all the thought and work they've put into this, I wonder if it will sound significantly better.

    1. Re:not a "pipe organ" by commodoresloat · · Score: 1

      Yeah, what a radical thought, like, a pipe organ should actually have pipes. Thing is, though, this really is a pipe organ, because in linux you can actually create your own pipes.

    2. Re:not a "pipe organ" by Anonymous Coward · · Score: 0

      Hmmm... I was always under the impression that 'electronic' organs have a totally different sound.

      While pipe organs are physically a bunch of pipes with air driven through them, original electronic organs ended up with a sound that would be pretty much defined as sounding like a Wurlitzer (think cheesy film music) based on analog circuits. Sampling came along in the early 80's and people discovered that you could go out and record real instruments. Cue sample-based synths.

      However, as the article pointed out, having an organ with 80-odd stops is a hell of a lot of tones to combine. The guy literally sampled each note for each stop. Essentially it's exactly the same as a mid-80's sample-based synth, it's just a very big synth.

      I was sort of hoping to read the story and find that someone had some uberamazing physical modelling synth (circa early 90s) that did some crazy maths to model an organ. That would have been impressive, and would also have confused old hat purists when you tried to explain virtually modelled pipes... ;)

      Either way, I doubt a sample-based organ or a physically modelled one would touch a real one for sound quality, there's just too much going on in there. Even physical modelling synths cheat sometimes - take the reverb off the flute patch on a Korg Prophecy and it doesn't sound anything like a flute, just some raspy thin air noise...

    3. Re:not a "pipe organ" by Anonymous Coward · · Score: 0

      They had pipes. But they smoked them.

    4. Re:not a "pipe organ" by Anonymous Coward · · Score: 0

      They don't want it to sound better. They want it to sound the same. My question is how accurate the phase is for all those different speakers and whether they had to do something like folks do for phased array antenna transmission.

    5. Re:not a "pipe organ" by King_TJ · · Score: 1

      Yes, but your thoughts on electronic organs never sounding as good as the "real thing" is just a personal opinion.....

      A number of the electronic organs used in 60's and 70's rock music are considered "modern classics" today, and had their own unique sounds that many people really like.

      I'd agree that the boomy, room-filling sound of a pipe organ is something that would be very tough to reproduce perfectly accurately with nothing but electronics -- but I think a pretty good approximation can be done. Pipe organ music was "felt" as much as it was heard ... so the proper amplification system is going to be key in making a believable simulation.

      Most acoustic instruments are a challenge to electronically reproduce with near-perfect accuracy - because vibrations and resonance of the materials that made up the original are a big part of the sound. The larger the instrument, the more the materials and vibrations play a role in the sound. I believe this is one reason why there seems to be an ongoing quest to get the perfect grand piano sound out of a synthesizer. The more RAM and CPU power they can cram into a synth, the more samples they can store and play back at appropriate times, getting incremental improvements. But ultimately, they're still doing little more than playing back a recording of the real thing being played - and so they hit limits of how well it was sampled from microphones in the first place, plus losses in authenticity due to the speakers and amplifiers used during the synth's playback.

    6. Re:not a "pipe organ" by John+Whitley · · Score: 1

      A professional music director/organist of my acquaintance played a large, wonderful, and somewhat elderly pipe organ at a local church. During the winter before it was finally renovated, the old organ was getting quite wheezy. They rented an electric organ for the season. He rather disparagingly referred to it as "the toaster". Seems that was a conventional term for the pipe-elitists to use. 8-)

    7. Re:not a "pipe organ" by CoughDropAddict · · Score: 1

      A number of the electronic organs used in 60's and 70's rock music are considered "modern classics" today, and had their own unique sounds that many people really like.

      I was speaking to electronic organs that are trying to imitate pipe organs. Rock organs are to pipe organs as an electric guitar is to a lute. The former are new instruments that spring from the evolution of an instrument family.

      I'd agree that the boomy, room-filling sound of a pipe organ is something that would be very tough to reproduce perfectly accurately with nothing but electronics -- but I think a pretty good approximation can be done.

      I never said it wasn't possible, I was only commenting that the electronic organs that exist today (specifically, those that imitate pipe organs) do not sound nearly as good as real pipe organs (well, good pipe organs. there are a lot of crappy pipe organs around). Of course that is subjective; has anyone ever invented an objective standard of how "good" something sounds?

      I love playing the organ, but playing an electronic organ does nothing for me.

    8. Re:not a "pipe organ" by Anonymous Coward · · Score: 0

      > While pipe organs are physically a bunch of pipes with air driven through them, original electronic organs ended up with a sound that would be pretty much defined as sounding like a Wurlitzer (think cheesy film music)

      Theater-installed Mighty Wurlitzers ARE pipe organs. The electronics in them refer to the bellows and the stops being electric, not anything to do with the replacement of the pipes.

    9. Re:not a "pipe organ" by bearwayne · · Score: 1

      I've heard electronic organs referred to by professional organists as "Toasters".

    10. Re:not a "pipe organ" by dunstan · · Score: 1

      It works the other way round as well. The church where I play is a small rural Catholic parish, and even the smallest pipe organ, voiced down, would overpower the space.

      So we have a sampled electronic instrument - not a toaster, it's a classical electronic instrument (with a full RCO [GB equivalent of AGO]) pedalboard, and a reasonable selection of classical stops. I don't need it to go particularly loud, because my average turnout is about 50. As I stated in an earlier reply, the loudspeakers move the air in a different way to a set of pipes, and in our case that is to our benefit.

      It's horses for courses.

      Dunstan

      --
      The last scintilla of doubt just rode out of town
  20. Wait a minute... by Anonymous Coward · · Score: 0

    ...this sounds like rock and/or roll.

  21. 5 4 3 2 1 slashdotted by webtre · · Score: 1, Informative

    PC-enabled tones rise from ruins of 9/11

    By Ron Wilson

    EE Times
    December 3, 2003 (4:30 p.m. ET)

    SAN MATEO, Calif. -- As the towers of the World Trade Center crumbled on that September day two years ago, the plume of debris they spewed claimed a victim that, although not human, was nonetheless irreplaceable to those who loved it: the mighty pipe organ in Trinity Episcopal Church at Broadway and Wall Street. Dust and detritus from the collapse rendered the church's 80-year-old Aeolian-Skinner organ unusable.
    But that lesser tragedy opened the door to a unique story -- of musical skill, love of an instrument, insight into signal processing and innovation in electronic systems design -- that this year has brought about a resurrection of sorts. Today a new mighty organ plays at Trinity -- not a pipe organ, but perhaps the most innovative electronic instrument ever to fill a sacred space.

    For Douglas Marshall and David Ogletree, principals of the Marshall & Ogletree LLC organ company in Needham Heights, Mass.), the loss at Trinity Church would transform what had been a hobby, perhaps an obsession, into a product development. It would be a unique chance to prove that the contrarian ideas they had formed over the course of a decade were correct, and that conventional wisdom about sampled-data electronic instruments was at best incomplete.

    Vanished gloryThe story began long before terrorists boarded airplanes that late-summer morning in 2001. Marshall and Ogletree, who grew up 15 years apart in Westwood, Mass., and who both went on to careers as concert organists, in the early 1990s formed a company to represent major organ builders to the church market.

    Along the way the two developed a love of the great Aeolian-Skinner pipe organs that are arguably the finest organs ever built in North America. With the Aeolian-Skinner Organ Co. gone, Marshall and Ogletree speculated about how the sounds -- and, more important, the playing experience -- of such instruments could be preserved.

    They hit upon a project to record samples of existing instruments around the United States and experiment with them. "We had hoped that we could build some sort of addition to an electronic organ that would convey the real sound of these instruments," Ogletree explained.

    The theory of sampling musical instruments is relatively straightforward. Depending on its physics, an instrument has an attack, a steady-state and a release, each of which has a different tonal signature. This complexity can be reduced substantially by a few approximations -- for instance, using the steady-state tone and simply modifying it with attack and release envelopes, perhaps throwing in some transients known to occur at the opening and closing of the "voice."

    In this sort of approach, it's only necessary to get a good recording of a moment of the instrument's steady-state voice, and the rest is signal processing.

    But Marshall and Ogletree ran into a problem: That approach didn't end up sounding like the real thing. "In 1997 or so, we were doing experiments with the digital sampling software that was just coming on the market," Ogletree said. "They were just starting to stream high-fidelity recording onto hard disks, and we were playing with it. We began to realize that the length of the recording made far more difference than we had believed."

    It had been assumed, Ogletree explained, that the sonic content of an organ voice matched what most people reported hearing. There is an initial, transient period of a second or so, after which the human ear can identify a particular note and stop, and then the voice remains constant until the release.

    But the data Marshall and Ogletree were collecting contradicted that. "The tone actually become steady a very long time after it seems to have settled," Ogletree said. "Recorded samples of the attack have to be as long as 15 to 20 seconds to capture the actual voice, because there are things going on during that entire period -- it's not a

    --
    litigious bastards
    suck it sco!
  22. 74 channels? Why? by Eiki · · Score: 4, Insightful

    The article raised more questions than it answered, for me. The part I don't understand is why so many channels are necessary - any loudspeaker will produce polyphony (when cell phones claim to have polyphonic ring tones, it has more to do with the tone generation circuit or software than with the speaker). Maybe someone who knows more about acoustics than I do can answer this one: what is meant by a "massive amount of polyphony"? More frequency content in the spectrum? And are the 74 Epiphany channels matched to 74 original pipes? Does each speaker play only one tone?

    Finally, does this also mean that recordings of organ music are poor substitutes for the real thing, since they will be played only on stereo speakers, which are presumably capable of "less" polyphony? I am sure that many organ zeolots have been saying all along that there is no substitute for live performance ... but c'mon, my Helmut Walcha CD's don't sound THAT bad, do they?

    1. Re:74 channels? Why? by wmguy · · Score: 5, Informative

      If you've seen a large pipe organ they can consist of thousands of pipes spread over a rather large area. The acoustic effect of having different tones coming from totally different areas of an auditorium is completely different than placing a hundred speakers throughout and having every one of them replicating the same sound.

      There's more to it than that...but that's all I feel qualified to bring up.

    2. Re:74 channels? Why? by Anonymous Coward · · Score: 2, Informative

      You also have to take into account that certain stops cover certain frequencies. Therefore your Piccolo on the Upper is not going to be coming out of the same speaker as the Tuba on the Swell, it would sound terrible.

      I'd also wager that some channels are specifically for bass. Organs put out a lot of bass - most of it will also be felt rather than heard. That also goes some way to reproducing an organ sound live.

      Ultimately, live sound is a totally different kettle of fish from recorded sound. That's why Britney doesn't sound like she's in your room when you turn it up loud, and also why The Rolling Stones don't tour with 2 speakers...

    3. Re:74 channels? Why? by Anonymous Coward · · Score: 1, Interesting

      In theory at least, any sound experience can be reproduced with only two channels - we only have two ears after all.

      Of course that would require listening with high quality headphones and a recording that is perfectly matched to the HRTF of the listener (Head Related Transfer Function - basically the how the shape of your head and ears effect the sound coming in from different directions in to your ears).

      I once did a simple experiment, I placed two small microphones in my ears, connected them to my MD recorder and walk around a while recording. I then played it back in a quiet room using headphones.

      It was spooky - I could tell exactly where each sound was coming from, the cars going by etc.

    4. Re:74 channels? Why? by Kiryat+Malachi · · Score: 1

      Polyphony was not really the proper word. Polyphony in musical instruments has come to mean the ability to produce multiple voices simultaneously.

      The explanation probably has a lot more to do with acoustic excitation of the space, diffusion of sound, and interference/intermodulation effects.

      --

      ---
      Mod me down, you fucking twits. Go ahead. I dare you.
      (I read with sigs off.)
    5. Re:74 channels? Why? by Eiki · · Score: 1

      Indeed, many live music buffs do exactly that, recording performances with two microphones clipped onto their glasses, or something like. They say that listening to a recording you made in this way can do a lot to improve your "critical listening" skills - you start to hear all of the deficiencies in your hardware, etc. Me, I'd rather remain content, I guess, than chase those diminishing audiophile returns.

    6. Re:74 channels? Why? by FindFirstOne · · Score: 1

      There is a belief among some recording engineers that it's possible to overload a sonic space. An example that comes conveniently to mind is Simon & Garfunkel's "Bridge Over Troubled Water" album. In order to keep the reverberation as clean as possible, Roy Halee used every echo chamber the old Heider studios had, sending only a few instruments to each. Any reasonable electrical or acoustic engineer will tell you there's no basis whatsoever for that - ten sounds played through one echo chamber, or even one digital reverb simulator, ought to sound exactly the same as ten echo chambers, each one being fed one instrument. Yet they absolutely do not.

      Voodoo? Maybe...after all, mixing's an art, not a craft or science. Or maybe Halee (and some other mixers) can hear things that mathematical models can't (yet) describe. People hear differently; real listening takes time and practice. Some folx will find simulated instruments irritating, while others will find them entirely satisfactory, but I'd wager that nobody will be able to axiomatize precisely why.

    7. Re:74 channels? Why? by Eiki · · Score: 1

      Interesting. I can maybe imagine that it is possible to "overload" the space. It seems like you should be able to put as many frequencies as you want into the air, but when you leave the pure world of the idealized frequency domain and consider real air molecules vibrating back and forth ... well, I can at least guess that something interesting might happen there (maybe something that can only be heard in certain exceptional cases), that I at least don't have the complete picture. But that's a lot of vague 2 AM speculation, isn't it? :)

  23. Unplayed by Human Hands by TerryAtWork · · Score: 4, Interesting

    is the title of an circa 1970 album recorded at the Jet Propulsion Center with a church organ driven by a computer.

    I have been trying to find it ever since.

    Does ANYONE have a clue where to look?

    --
    It's Christmas everyday with BitTorrent.
    1. Re:Unplayed by Human Hands by Call+Me+Black+Cloud · · Score: 1


      Did you check the garage?

    2. Re:Unplayed by Human Hands by dirkmuon · · Score: 2, Interesting

      Cover art.

      A Google search shows that the album was reviewed by Computer Music Journal (Fall '77). It seems to have been the work of Prentiss Knowlton, who is cited in a different online source for connecting an electronic organ keyboard to a PDP-8 computer. There are some other references to Prentiss Knowlton on Google that might help you track him down.

    3. Re:Unplayed by Human Hands by Webmoth · · Score: 1

      Not quite the same, but if you take certain HP scanners, set them to SCSI channel 0, then hold the scan button when turning them on, they play "Jesu, Joy of Man's Desiring"

      --
      Give me my freedom, and I'll take care of my own security, thank you.
  24. pales by 602 · · Score: 3, Interesting

    I ain't heard it, but my guess is that the sound from this device pales in comparison to a good pipe organ. It ain't about power, it's about a very complex sound waveform that may or may not be reproducible. Go listen to a top-notch organ sometime, then tell me whether you'd be interested in hearing a digital simulation. (I don't mean to be disparaging to these guys, though--they're welcome to try.)

    1. Re:pales by Anonymous Coward · · Score: 0

      Did you RFTA?

      No, I thought not.

    2. Re:pales by Anonymous Coward · · Score: 0

      For those (in the US) who are truly interested in hearing a good quality organ, a good starting place might be The American Guild of Organists. Just click on your region, and you'll see a long list of people you could probably e-mail and ask about it.

  25. Gotta get me one of these by Anonymous Coward · · Score: 5, Funny

    put it in a car and when the kid next to me decides he has to have his ghetto rap turned all the way up for the benefit and enjoyment of everyone in the general area . . .

    * B O O M *

    Ride of the Valkyries

    heh heh heh

    1. Re:Gotta get me one of these by Anonymous Coward · · Score: 2, Funny

      I have a highly paid friend who does just that. He got fed up of driving around, having to listen to other people's crap, soo...

      Smarmy boy-racer type with the baseball cap on cruises up alongside us at the lights in his Ford Escort with the (now obligatory) blue light underneath, aircraft wing glued on the back, tiny blonde in the passenger seat, and 50 Cent hammering away on the stereo... ...so we just turn Elgar up a bit.

      Last time we did that the other guy stalled.

    2. Re:Gotta get me one of these by FuzzyBad-Mofo · · Score: 2, Funny

      Better yet, the 1812 overture. Just don't forget to put in earplugs for the cannon solo! <eg>

    3. Re:Gotta get me one of these by Chris+Brewer · · Score: 1

      Man, I tried putting that tune into my head, and you know what got stuck in there instead?

      Theme to Star Wars.

      I gotta get out some more.

      --
      Consultancy: If you're not part of the solution, there's money to be made in prolonging the problem
    4. Re:Gotta get me one of these by robi2106 · · Score: 1

      No no no. Play all 48 pieces in the Well Tempered Clavier book I & II and bore them to death!

      jason

    5. Re:Gotta get me one of these by Anonymous Coward · · Score: 0

      How about Grieg's In the Hall of the Mountain King for chuckles (I know I've heard it in one-too-many TV commercials)? Or maybe Bach's Passacaglia in C Minor, since this is on the topic of organs.

    6. Re:Gotta get me one of these by Anonymous Coward · · Score: 0

      Reminds me of the stereo wars in The Big U.

  26. I call BS by commodoresloat · · Score: 4, Funny

    Blender is open source, so if your friend wants a fork in it all he has to do is download the code and write it himself.

  27. If you want something similar to run on your PC... by MarcoAtWork · · Score: 5, Informative

    check out http://www.hauptwerk.co.uk/ some of the larger organs (sampled pipe-by-pipe) require up to 1.5GB of ram to work and sound really good (check the site for samples esp. the ones of the commercial organ vendors).

    --
    -- the cake is a lie
  28. Obligatory SCO comment by gilesjuk · · Score: 2, Funny

    SCO will tell them to change their tune if they complain about license fees :)

    1. Re:Obligatory SCO comment by Anonymous Coward · · Score: 0

      I just knew SCO was going to sue God sooner or later...

  29. Next week on Slashdot... by WIAKywbfatw · · Score: 1

    Linux user blows own trumpet...

    --

    "Accept that some days you are the pigeon, and some days you are the statue." - David Brent, Wernham Hogg
  30. Organ Music - Ina Gada Da Vida by Anonymous Coward · · Score: 0

    15,000 watts of Ina Gada Da Vida, the extended version...

    1. Re:Organ Music - Ina Gada Da Vida by Anonymous Coward · · Score: 0

      As seen on the Simpsons? That was very funny.

    2. Re:Organ Music - Ina Gada Da Vida by Anonymous Coward · · Score: 0

      What the? This looks like rock and/or roll!

  31. Must have a heck of a subwoofer design by Anonymous Coward · · Score: 0

    Were it my pick I don't think I would be particularly drawn to DefTech's. Yeah, they have been doing bipolars for quite some time and the spaciousness of bipolar sound should be impressive, but somebody like Mirage would have been further up my list.

    However, it is the subwoofer design and usage that intrigues me! While I'm no bass-hound, shake your guts from my vehicle kinda guy, pipe organs produce some tremendously low frequencies. When you get to sub 20hz frequencies, you begin to go below the average humans audible range. The sound starts to become less heard and more "experienced". Makes me wonder just how sensitive their sampling equipment was and just how they are setting up the subs, and more importantly the crossovers, for this monster.

  32. physical modeling + volume by Anonymous Coward · · Score: 1, Interesting

    Sample based synthesis basically sucks. Why didn't spend the time and money developing a truly good physical model?
    A physical model of an instrument models the sound producing mechanism with equations, and responds like the real thing (or at least *very* close when it is a good model).

    They need such huge amplification because these big pipe organs are really loud: in the Sydney Town Hall organists are forbidden from playing the lowest notes because it shakes the foundations of the building (and the town hall is a very big and sturdy building). NB I'm serious!

    1. Re:physical modeling + volume by adrianbaugh · · Score: 1

      Possibly because they didn't have the Earth Simulator to run this physical model on. While a physical model would be ideal, to get it simulating everything it needs to to produce a satisfactory output would require huge amounts of computer time.

      --
      "'I pass the test,' she said. 'I will diminish, and go into the West, and remain Galadriel.'"
      - JRR Tolkien.
  33. Re:omfg by Anonymous Coward · · Score: 0
    I guess you didn't read the friendly article.

    In the first paragraph it states that

    Dust and detritus from the collapse rendered the church's 80-year-old Aeolian-Skinner organ unusable.

  34. *BSD Pipe Organ by Anonymous Coward · · Score: 0

    I saw a *BSD-based pipe organ once. All it could play was dirges and Jerry Garcia tunes.

  35. Obligatory SCO reference by fiannaFailMan · · Score: 2, Funny
    The system consists of 10 Linux PCs
    That'll be $6,990 then sir.
    --
    Drill baby drill - on Mars
    1. Re:Obligatory SCO reference by Anonymous Coward · · Score: 0

      Just when the SCO$699FeeTroll would be more than welcome, he's nowhere to be seen...

  36. Ob. Simpsons Quote by Anonymous Coward · · Score: 0

    "THX-The audience is listening"
    "Turn it up!"

  37. As usual Knuth is an expert by Anonymous Coward · · Score: 0
  38. a new level of ear-fucking... by painehope · · Score: 5, Funny
    Let's see - I have 3 linux machines, one Irix, an O2 that I'm about to slap NetBSD on, 3 ( currently unused ) old RS6K workstations, plenty of old speakers ( might need a few more heavy hitters ), and a serious dislike of the rap bullshit my neighbors across the street play.
    All what I need to do now is brew some napalm ( easy ), crank up the Wagner, put on some combat boots and a silly hat, and turn their front yard into a beachhead.

    For those who don't get it, see Apocalypse Now.

    --
    PC moderators can suck my White pierced, tattooed dick. If you think pride == hate, s/dick/Aryan meat mallet/g.
  39. Things to ponder by Anonymous Coward · · Score: 5, Funny

    Since it has speakers rather than pipes, if you had a lot of them, would you have a Beowoofer cluster?

  40. neuromancer by Hubert_Shrump · · Score: 0, Offtopic

    su finn
    echo 'jack in, case' | festival --tts &
    killall case


    --
    Keep your packets off my GNU/Girlfriend!
  41. yeah!! the TMH makes slashdot by Anonymous Coward · · Score: 0

    who'd have thunk it?

    Anybody recently seen a concert at the TMH? They have a fire captain come and brief the audience on how to escape if a fire happens.

    Due to the seating, narrow stairs, and all the fine wood panels and trim, the place is a firetrap.

    It really does sound fantastic though

  42. Re:No. by Anonymous Coward · · Score: 0

    Haha. Some assembly required!

  43. Carver amps? by Bleeblah · · Score: 0

    All the money they saved on OS, and they bought Carver?

  44. But... by Anonymous Coward · · Score: 0

    does it run Linux...

    ok, never mind

    Imagine a beowulf claster..

    Ah forget it....

  45. no. by Anonymous Coward · · Score: 0

    And far from it.

  46. It's a synthesizer, not an organ. by sakusha · · Score: 1

    I'm not impressed. I'd be really impressed if they did something really cool like build a modern pyrophone (a/k/a Flame Organ).

    http://www.deadmedia.org/notes/16/162.html
    http ://www.deadmedia.org/notes/16/162-comment.html

    Fuck this fake digital shit, sometimes analog is way cooler, especially when it involves exploding large amounts of flammable gases.

  47. On pipe organs... by Raetsel · · Score: 4, Informative

    I'm noticing a fair amount of discussion here regarding "...why 74 amps/speakers?" As someone who has worked on pipe organs, here's what I am assuming:
    • They have one for each stop (or subset of stops) on the original organ.
    What is this "stop" I refer to? It's a collection of pipes with a specific sound... Vox Humana, Trumpet, etc., that the organist can choose and (in some cases) assign to a specific keyboard. An organ the size of the Trinity Church Aeolian-Skinner would have had dozens of stops. Even a small pipe organ has quite a few -- more than 10 is quite common.

    Each stop has a default keyboard with a specific name, related to which wind chest the pipes are located on ("Great", "Swell", "Choir"... though those are just starting points).

    Along with the location of these pipes on certain wind chests comes other factors... only the set of pipes on a chest called 'swell' can have their volume controlled -- usually by way of a set of shutters that open and close. The rest of the organ pipes play at the same volume all. the. time.

    Another thing about pipe organs... some of them (I don't know about this specific one) run on very high pressure. Normal for the pipe organs I worked on was 8 to 10 inches of water. I heard one that ran at 80 inches of water, and the 'attack' of the sound was like a gunshot. I have yet to hear a speaker that can duplicate that sound.

    --

    "...America's great minds of today, teaching America's great minds of tomorrow. Poor bastards." -- A Beautiful Min
    1. Re:On pipe organs... by Anonymous Coward · · Score: 0

      I heard one that ran at 80 inches of water, and the 'attack' of the sound was like a gunshot. I have yet to hear a speaker that can duplicate that sound.

      I knew a sound guy (not audio engineer, more like "friend of bandmember") who did a credible job of replicating that sound once. "Square wave" was his nickname for the duration of the gig.

      The trick was that he couldn't do it twice. On that particular PA. That day.

    2. Re:On pipe organs... by KillerHamster · · Score: 1

      I'd just like to mention that "stop," as I've always heard it used, refers to the electrical switch on the organ console, while "rank" refers to an actual set of pipes. A stop usually activates one rank, but some activate several; these are called mixtures. Many organs, especially theatre organs and smaller classical organs, have many more stops than ranks. Often, there will be stops in different divisions (great, swell, pedal, etc.) that activate the same rank. Sometimes an organ will have multiple stops that activate the same rank at different pitches (16', 8', 4', etc.) and may even give them different names. Some "stops" are really couplers, meaning that they link one keyboard to another. Thus, the number of stops an organ has does not necessarily reflect its actual size.

      Skinner organs, at least the ones I've seen, tend to be huge (the company is known for its orchestral organs; the one in Severance Hall in Cleveland is a great example), so it makes sense that you would need a number of computers to simulate it. As for the speakers, I would imagine that ideally, you would want one for every pipe, designed to play that pitch optimally. This, of course, would probably cost more than pipes. I'm an organist, not a sound engineer, so I really can't say much about how to best reproduce organ tones electronically. I will say, though, that I can instantly recognize electronic organ music, and I don't think anyone will ever be able to electronically reproduce the sound of a large organ perfectly.

      The biggest benefit I can see to building an organ like this is that it won't need tuning. Tuning an 80+ rank organ takes forever and is expensive. And it will be nice when the technology makes its way into smaller home organs.

    3. Re:On pipe organs... by Anonymous Coward · · Score: 0

      80 inches of water is about 2.9 psi, or about 1/5 of atmospheric pressure at sea level. That doesn't seem like very high pressure to me.

  48. The Big U by FiloEleven · · Score: 1

    I actually thought of another Stephenson novel, The Big U. There's a subplot that features a gargantuan pipe organ and the effects of resonance at 16 Hz...very good book, if a little rough.

  49. You're forgetting: the point is to disturb. by Anonymous Coward · · Score: 0

    the point is not to entertain.

  50. I gotta do it: Why did Bach... by Onan+The+Librarian · · Score: 3, Funny

    have so many children ?

    Because his organ had no stops...

    (Btw, thanks for the technical info !)

  51. Virgial Fox? by Anonymous Coward · · Score: 0

    Does it run Virgil FoxPro??

  52. Eh by Compact+Dick · · Score: 2, Informative

    Anyone who browses Slashdot with his/her family around should know better.

  53. Large Hot Pipe Organ by Curl+E · · Score: 2, Interesting

    Yeah, it might sound great, but is it as cool as the LHPO? Quoth the site:


    The Large Hot Pipe Organ is the world's only MIDI controlled, propane powered explosion organ. The LHPO's pyro-acoustic explodo-rhythmations will throbbatize your earholes and dance-ify your booty and make you realize what "Industrial Music" REALLY means!
    --
    Backups are for wimps. Real men post their data in comments and have slashdot mirror it
  54. Silophone by GQuon · · Score: 1

    Well, that may be real organ music. But for a HUGE fake "organ" (you know, since the article is about a fake organ), look here.

    --
    Irene KHAAAAAAN!
  55. Direct link by GQuon · · Score: 1

    Direct link: Silophone.net

    --
    Irene KHAAAAAAN!
  56. Janet Cardiff's 40-Part Motet by Lev13than · · Score: 1

    This reminds of Canadian artist Janet Cardiff's remarkable art installation 40 Part Motet, which represented Canada at the 2001 Venice Biennale and won the Millennium Prize at the National Gallery of Canada.

    Cardiff recorded Spem in Alium nunquam habui, written by Thomas Tallis in 1575. The piece is unique in that was designed for eight choirs of five people each. Cardiff made her recording by capturing each voice separately and on its own track. The piece is then played back over a circle of forty speakers in the installation space (here's how it looked at the Tate). I saw it when it was at the National Gallery, where it was set up in the Gallery's Rideau Chapel.

    The effect is breathtaking - from outside the room it sounds like a normal choral piece, but once inside your perspective changes. By standing in the middle of the circle you can feel the voices blend and wash over you. You can then walk up to each of the speaker sets and hear that group's harmony. Step closer and you can hear each individual voice. By moving around the room you can experience different parts of the sound sculpture.

    When the piece ends there is complete silence. After about a minute you can hear rustling and whispering from speakers as the choir gets ready, and then the piece begins again. You have to hear it to understand.

    The end result is a complete immersive 3-dimensional aural experience that, like the organ, would be completely impossible to replicate with one, two, or even a handful of speakers.

    --
    When you have nothing left to burn you must set yourself on fire
  57. Just some random thoughts ... by gordguide · · Score: 4, Informative

    I like pipe organs; Bach on a big pipe organ is awesome. (Re-reading that sentence it occoured to me that's probably the only time I properly used the now-trivialized word "awesome".) But lets move on ...

    I'm not much of a church goer, but whenever I'm in a new city I try to find out if there are any good pipe organs in town (a big city might have none, one, or a couple) and I will spend a Sunday morning in church.

    They all sound different, and the church itself is as much a part of the sound as anything. Pipe organs in general have lots of power, the kind you feel as much as you hear.

    I've spend most of my life in Audio, and I can tell you without any reservation at all that I've never heard a pipe organ properly reproduced on any sound system, period. Cannons? Yep.
    Full Orchestras? No problem.
    Rock n Roll? I've sworn I could reach out and touch musicians.
    Pipe Organ? I've heard it come close, but you always know.

    So, these guys can't be faulted for lack of ambition.

    A difficult concept to pull off; I would love to hear this attempt, which pretty much mandates that I go back and listen to the new organ when they rebuild it. My guess is the real deal will sound subtly better. It's a given that they will sound different, even though recreating a live insturment in the same room is less challenging than recreating something with a recording. But, since I've heard neither, that's just thinking out loud.

    I was a bit suprised to learn they chose DT speakers because the wanted a bipolar; they make good gear but there are other bipolars I would have considered (maggies, for one; I've done church installs with them and they work very well in the typical acoustic space a church provides).

    Having said that, I would have tried omnipolar speakers first; in my way of thinking they would have a better chance to reproduce the acoustic signature of pipes (omnipolar radiate 360 degrees, like an organ pipe does; bipolars radiate front + back but little to the sides).

    The Carver amps were also a bit of a suprise; I've never found them to be top-notch although they're certainly better than average.

    Of course, it all makes sense if go a bit crazy here and assume they were radical enough to have bought into some wild concept I've heard about called "A Budget".

    I agree that Linux is the proper OS. If Bill IS the Antichrist (not to say he is, but ...), the worshippers need to invite him into the fold to get that End Of The World thing going.

    Better safe than sorry, I say.

  58. Re:Jim Lord by cerebralpc · · Score: 1

    I saw an interview with Jim Lord from Deep Purple recently where he talked about the church organ recording they did for one song.
    They just loved the sound this particular organ made in some isolated church.
    To record it they actually set up a telephone line from the church to the recording studio.
    Bizarre but they where not able to bring any mobile recording equipment to the church.

  59. The Aeolian-Skinner specification by Angora+Mink · · Score: 1

    I don't see where the "74" comes from, either. It looks to me as if the stop count on the A-S at Trinity would be 115 stops. Note that there's a lot more to building a *good* organ than throwing in a large array of pipework. Does the complete ensemble work together? Does each stop contribute some real character? If one stop sounds too much like another, it's added expense without a lot of benefit. If it clashes tonally with other stops, that limits its usefulness.

    Aside: The bipolar pattern of the DT speakers raises my eyebrows a bit, since the rear projection is 180 degrees out of phase from the front. I can't think of a pipe configuration that would have that characteristic.

    Drat! I wanted to post the stoplist here to avoid /.'ing Osiris, but then my characters per line goes too low to post...

  60. If you're tired of the news in Surrey by Anonymous Coward · · Score: 0

    Perhaps you should fucking move.
    What do you want them to write about? Shit that's happening in Bolivia?
    Fucktard.

  61. GREAT , Now they can play Phantom at 25k W by Anonymous Coward · · Score: 0

    Wonderfull give Ney Yorkers a 15,000 Watt Pipe organ, any bets on how long it will be before someone plays Phantom of the Opera on it ?

  62. Music on Pipe Organ by BanjoBob · · Score: 4, Informative

    Deutche Grammophon did an album by Bach that was recorded on the world's biggest pipe organ - Organ of the Jaegersborg Church, Copenhagen. The album, Famous Bach Organ Works from Karl Richter, is fantastic at tearing apart speakers :) The album, is available on CD now but mine is on an LP. If you have a great stereo, this will get you close to what a true pipe organ sounds like.

    --
    Banjo - The more I know about Windoze, the more I love *nix
    1. Re:Music on Pipe Organ by ContraB · · Score: 1
      Deutche Grammophon did an album by Bach that was recorded on the world's biggest pipe organ - Organ of the Jaegersborg Church, Copenhagen.

      Worlds' Biggest Pipe organ, eh? I doubt it.

      But in fairness, many pipe organs claim to be the biggest, and probably many of them aren't lying. Depends on how you measure.

      Most pipes? That's one way. Most stops? That's another way, and it's not necessarily the same as the most pipes. Biggest pipes? A very few instruments have pipes 64' long. Loudest? An instrument could have fewer pipes and stops but be much louder.

      ...and so on...

      Then, you have the question of "largest" vs "largest fully functioning". You could have 500,000 pipes in an instrument, but if only 200,000 are in playable condition at one time, is it really the largest? The organ at the Atlantic City Convention Hall has this problem. They have two full time employees and can't keep up with maintenance, let alone fix all the broken bits.

      Three exceedingly large pipe organs with, in my opinion, legit claims on "biggest", depending on how you measure:

      The Atlantic City Convention Hall. One of the few instruments in the world with a 64' pitch. This an actual pipe, too, not electronically produced. Amazing how few people know about this instrument. http://www.acchos.org/

      The West Point Chapel pipe organ claims to be the largest church pipe organ in the world: http://www.usma.edu/tour/CadetChapel.asp

      The (former) Wanamaker Department Store organ in Philadelphia, PA has some claims to largest: http://www.wanamakerorgan.com/index1.html

      And that's all I gotta say about that!

      --Thad, who knows his organs. ;)

      --

      -=-=-=-=-=-=-=-=-=-=-=-=-=-=-
      Much like a newborn puppy...
    2. Re:Music on Pipe Organ by BanjoBob · · Score: 1

      Thanks for the corrections and a lot of info. You do know your organs ;)

      I got this comment off the back of the album and I am certainly no authority on pipe organs so I graciously stand corrected!

      Banjo is my instrument - easier to carry around and tune ;)

      --
      Banjo - The more I know about Windoze, the more I love *nix
    3. Re:Music on Pipe Organ by ContraB · · Score: 1
      Thanks for the corrections and a lot of info. You do know your organs ;)

      I got this comment off the back of the album and I am certainly no authority on pipe organs so I graciously stand corrected!

      Banjo is my instrument - easier to carry around and tune ;)

      No problem... I don't know if I'd call it a correction though. I don't know the organ you referred to at all; maybe it's the biggest in some category or other. I should look it up. Anyway, "largest pipe organ" is a pretty weak thing to brag about. I'd be more concerned about whether it sounds good, the acoustics of the space, and whether organists find it to be good to play...

      Double Bass is my instrument. (Hence "ContraB"-- short for ContraBass.) I agree on the "ease of tuning part". :)

      Later,
      --Thad

      --

      -=-=-=-=-=-=-=-=-=-=-=-=-=-=-
      Much like a newborn puppy...
  63. Sigh by Anonymous Coward · · Score: 0
    Just goes to show. Man, it blows like an organ. Get it, you three-toed, slack-jawed mouth-breathers?

    Sweet Jesus save us all, the sense of humor is gone from the world.

  64. Wow this is a technologiccal feat by Anonymous Coward · · Score: 0

    Wow computers can do stuff? Who knew? And 600 feet from 'ground zero'? Who the fuck cares? "I'm making this post from my computer, only 2000 miles from 'ground zero'." Ooooooooo, how poignant. Fuck off.

  65. News: Nix Zealots are Holier Than Thou by g_bit · · Score: 1
    I knew there was something religous about this.

    Actually, I've got to say that Mac zealots are the holiest, but now there's OSX for new and improved snobbery.

  66. Some subtleties... by anachron · · Score: 5, Insightful

    I *am* an organist... and I've played some very, very good electronic instruments, but none have exactly modeled the experience of a real instrument, and it's not because of any large lapse of sound quality or discrepency in the samples or production.

    There are a combination of things that, added up, definitely detract from the unique experience of a well-built pipe organ. Often, the electronic instruments do not accurately model how a pipe speaks -- only the tone once a pipe is speaking. Also, there's a difference in the response/attack of reed pipes, flute pipes, principal pipes, etc. -- the electronic instrument often models the sound accurately, but doesn't capture the actual 'feel' of the sound, and the performer would overcompensate.

    This makes it difficult both for the listener, who will notice a difference since the electronic instrument is probably not voiced in the same way as an acoustic instrument (which is specific to the room in which the instrument is built). Also, the performer may not be comfortable with playing his Bach on a non-mechincal (or electropneumatic) instrument, and this would contribute to the feeling of unnatural-ness. (Maybe we, as performers, just haven't found a good way to deal with the actual articulation/technique problems on electronic insturments.)

    1. Re:Some subtleties... by Anonymous Coward · · Score: 1, Informative

      I've heard it :) It's clearly unlike any other electronic organ. While it's not exactly the same as a real pipe organ, it comes remarkably close to the experience. The pipe sounds do in fact act like the real thing. If you have a chance to be in NYC it's definitely worth checking out.

      Btw, I found the builder's site: http://www.organpower.com/html/m_o_home.html
      Look s like they mostly have links to other
      news stories at this point.

    2. Re:Some subtleties... by dunstan · · Score: 2, Interesting

      The fundamental issue is how the air is moved - any loudspeaker will fundamentally move the air differently to an organ pipe. And the more pipes you have blowing, the more the difference matters: you can have a lot of big speakers, but a large organ with a lot of stops drawn can be blowing 200-300 pipes at once. And that is an awful lot of air moving.

      And at the same time, you have to remember that if you have a lot of loudspeakers close together, they will all cause each other to resonate, effectively a form of cross talk. On the other hand, organ pipes are made of metal, and cause very little cross resonance.

      These guys have created a magnificent instrument, probably at a tiny fraction of the cost of a pipe organ (and with a fraction of the lead time), but I bet that playing it is like kissing your auntie - missing the frisson of the real thing.

      Dunstan

      --
      The last scintilla of doubt just rode out of town
    3. Re:Some subtleties... by DerekLyons · · Score: 1
      The fundamental issue is how the air is moved - any loudspeaker will fundamentally move the air differently to an organ pipe.
      It's interesting that you titled your comment 'Some subtleties...', yet missed the biggest one, which is inherent in your first sentence.

      Organ pipes actually do move air, while speakers only induce vibrations in the air adjacent to the diaphram.

    4. Re:Some subtleties... by dunstan · · Score: 1

      Good point. And it's not a small amount of air - some big instruments need several sizeable blowers.

      Not only is there actually a lot of air moving through and out of the pipes, the sound comes out pretty much uniformly through 360 degrees, where a loudspeaker puts it out of the front (or in their case the front and back, but not the sides).

      Dunstan

      --
      The last scintilla of doubt just rode out of town
  67. Clever nick you got there. by Compact+Dick · · Score: 1

    Thanks for the hearty chuckle :-)

  68. Not even trying to be the same as the real thing by Webmoth · · Score: 1

    Reading the article, I got the impression that they weren't trying to exactly reproduce an entire pipe organ, but to provide an interim solution until the original organ can be repaired or replaced.

    I would expect that the range of voices and tonal quality (not to mention cost) of the Epiphany far exceeds what can be achieved with even the best MIDI keyboards or even simulated pipe organs such as these.

    Nonetheless, you must have admiration for the engineers who developed this organ. It's truly a marvelous feat of engineering.

    Not to be confused with the marvelous (?) feet of engineers.

    --
    Give me my freedom, and I'll take care of my own security, thank you.
  69. cool but now by Adler · · Score: 2, Funny

    i wanna know if the volume goes up to "11"

    --

    Everybody denies I am a genius--but nobody ever called me one!

  70. Mod AC Up by Webmoth · · Score: 1

    "I just knew SCO was going to sue God sooner or later..."

    Only about the best SCO comment I've seen in a while

    --
    Give me my freedom, and I'll take care of my own security, thank you.
  71. Yes it does by Sycraft-fu · · Score: 3, Informative

    The more wattage you feed into a given system, the louder it will play, until you reach teh speaker limits. If I feed 1 watt into each of my speakers, I get a nice normal listening level. If I feed 150 watts into each speaker (the limit of my amp) I'd blow my eardrums in short order.

    Now, there are other factors that matter in loudness. The next one after wattage would be efficency. Given a watt of input, what kind of output does a speaker give? Obviously, the more efficient the speaker, the louder a system will be at a given wattage. I don't know how efficient most consumer speakers are, they don't usually list the stats. Good high end speakers (pro/audiophile) tend to be in the 88-90dB/watt @ 1 metre. A stage speaker can be in the 100-109dB range, maybe even higher though I've never heard of one.

    Well then the @ 1 metre spec brings us to another component: distance of the listener. Loudness depends on proximity to the source of the sound. Thus a person sitting next to a speaker will hear a much different level than one across the room.

    The room, yeat another problem. In an environment with no reflections, sound will decay much faster than an environment with lots of them. So depending on the kind of hall you are in. In a very dead hall, people in the back will hear much less sound in the front. In a properly designed hall, they'll still hear plenty.

    Of course it doesn't end here, it depends on lots of other things like frequency range, which drivers are being used how much and so on.

    Point is there are too many vairables to try and give a final number as to how loud something will be. None the less it IS desirable to have SOME kind of indication. Well wattage is a good one. Not a great one, not a final and all consuming one, but a good one. If I have a 1000 watt system, I can say with some confidence it is going to be pretty loud. IF I have a 10 watt system I can say with some confidence it will not be nearly as loud. I can't caluclate an absolute difference, but I can get a general feel, with one number. If you want a better loudness stat, the best you can reasonably do is a wattage stat and a sensitivity stat. Past that, it all comes down to specifically what you are using it for.

    As a side note, 1% THD is quite acceptable for speakers, and you'd not notice it unless you knew what to listen for, and even then probably only on a sinewave test. My high end speakers (cost over $2000/pair) produce 1%THD (or even more) at high volume levels.

    Which, of course, is another consideration, since you're being pickey about stats. THD at what volume level? Speakers' THD increases with volume. Also within what frequency range? A speak setup may have good THD over most of its range, but under or over a certian point it may increase quite a bit.

    Stats aren't perfect. Deal with it.

  72. Troy Music Hall by Cowclops · · Score: 1

    I live in Troy myself, and I must say the Troy Music Hall is an amazing place to go for a concert if anybody ever gets the chance. I knew some people in the Empire State Youth Orchestra, and they played there a couple times a year, so I usually went to those concerts. It was amazing.

  73. Is the story the organ, or the OS? by Anonymous Coward · · Score: 0

    I wonder... would this story have been selected had the OS been Windows or OS X?

    1. Re:Is the story the organ, or the OS? by mlock · · Score: 1

      Well, we all know that linux has the fastest/biggest pipes ...

  74. MOD PARENT UP by Anonymous Coward · · Score: 0

    Wish I would make an account so I could do it myself...

  75. Conversion factor by Webmoth · · Score: 1

    1 PSI ~= 27.6799048 inches of water ~= 6.8947573 kPa

    80 inches of water ~= 3 PSI ~= 20 kPa

    --
    Give me my freedom, and I'll take care of my own security, thank you.
  76. Now... by MWoody · · Score: 1

    They need 10 monkeys to dance...

  77. Tracker Action by Detritus · · Score: 1
    The article does not say what type of keyboard action they are emulating. I fear that it is the electric action of many modern organs.

    Having listened to way too many E. Power Biggs records, I agree with his poor opinion of electric actions, which he once described as the organist telegraphing his intentions to the instrument.

    An organ that uses a mechanical tracker action to connect the keyboard to the pipes, allows the organist to control the attack of the notes. Sort of a velocity sensitive keyboard, like a piano. The article didn't say if they tried to model this.

    --
    Mea navis aericumbens anguillis abundat
    1. Re:Tracker Action by radish · · Score: 2, Insightful

      Whilst I don't dispute the advantages of a truly mechanical analogue control mechanism (DJ/vinyl junkie speaking!), all you really have to measure is the velocity of the key over time. MIDI keyboards have been doing that for years. The problem is not so much measuring what the musician is doing, but the fact that a piece of plastic attached to a hinge and a sensor just doesn't feel the same as a chunk of heavy wood coated in ivory tied to a mechanism attached to a hammer. It's more the feedback to the musician than the ability of the instrument to gauge the expression. Hence the best digital pianos (e.g. Yamaha Disklaviers) use a real grand piano, complete with all the traditional mechanisms, and just attach sensors to measure velocity & pressure. The result is far better if you're used to a piano keyboard. Of course, some of us learned to play on a synth, and can't play at all on a real piano, what with all those hammers and that darn key bounce!! :)

      --

      ---- Den ene knappen er powerknapp, den andre er Bender voice knapp "Bite My Shiny Metal Ass"

    2. Re:Tracker Action by Alioth · · Score: 1

      You can do quite well in a portable keyboard (for only liftable by a weightlifter values of portable) like my Roland A90. It's got a remarkably good 'hammer action' feel, complete with that little bit of rebound you feel on a real piano when the hammer mechanism falls back after striking the string. The reason why the keyboard is so heavy is the components that make up this hammer action.

      It makes the keyboard MUCH nicer to play than your 'piece of plastic and hinge' style keyboards.

    3. Re:Tracker Action by Knife_Edge · · Score: 1
      As an organist, I'm going to have to point out that you really don't know what you are talking about. The solution of just measuring the key velocity over time does not work as a model for a tracker action organ.

      The problem on a tracker action organ is not one of a piano, where the velocity of the key determines the velocity of the hammer, which in turn determines the sound. No, the key operates a level action, which opens a pallet (like a valve for admitting air to the pipe), which is held in place by a spring. So as you press the key, the resistance changes throughout the travel of the key. There is also an effect of wind pressure on the pallet. Depending on the size/shape of the pallet, and other variables in the wind system, this produces a feel we call 'pluck,' basically the resistance to getting it open.

      Moreover, the speed at which the pallet is closed has a nontrivial effect on the sound. So you need to model that too. At the very least you would have to measure the position of the key, and have a mechanical mechanism change the resistance all the time in order to simulate the feel of the pallet.

      But that's not really the half of it, if you think about it, to really model the opening of the valve to admit air, you are going to get into fluid dynamics, especially if modeling the shape of a specific pallet under a specific amount of wind pressure (opened and closed in a specific way) is a concern to you.

      And yes, we like mechanical action organs because they allow us a greater degree of control over the sound than electronic action ones (both of which have pipes, I refer to the KEY action), almost a sensation of 'wind at one's fingertips.' Really, the pipe organ is a wind instrument that happens to be played by means of a lever action of some sort. A good player with a good touch at a well-regulated mechanical action can manipulate the flow of wind to produce a more expressive effect than the same player with an electronic action (that always opens and closes the pallets in the same way no matter what). The effect is audible, it is important, and it is not easy to electronically simulate.

    4. Re:Tracker Action by radish · · Score: 1

      Hmm, I think we're agreeing yet disagreeing with each other. I'm not saying it's easy to model the acoustics of a mechanical system, and I'm in no way diminishing the complex way in which the sound can be manipulated by a skilled player with such a system. BUT (and it's a big but) at the human interface level all you have is a bunch of pedals and a bunch of keys. All the kays can do is go up and down. That's it. They can't go side to side, or in and out, or round and round. If you can record the velocity of that key over time (and it's position of course) you have all the data you can have. Taking that and making it sound right is of course a much harder problem (and, I would imagine, a pretty much intractable one) but from a data acquisition point of view there simply are only two possible variables - position and velocity. If you can measure those accuratly you are done. Finito.

      Going back to the piano, all the things you mention affect that instrument too. How long you hold the key down affects the envelope hugely, the pressure on the key while you hold it, the way you release it. All those can and are captured by decent mechanisms. What can't be done, even for a simple instrument like a piano (compared to an organ) is recreate the sound produced by those movements accurately, without using actual strings and hammers.

      --

      ---- Den ene knappen er powerknapp, den andre er Bender voice knapp "Bite My Shiny Metal Ass"

    5. Re:Tracker Action by Knife_Edge · · Score: 1
      All the keys can do is go up and down. That's it. They can't go side to side, or in and out, or round and round. If you can record the velocity of that key over time (and it's position of course) you have all the data you can have.

      I remember thinking about this before, and I'm inclined to think you are right, now that you mention position. But yes, from this information you must perform calculations very rapidly in order to extrapolate both the feedback the simulated instrument would give and the sound that would be produced. That is probably too difficult to do with current technology. Unless it were done in hardware, which would doubtless be quite expensive, since if dedicated circuitry was required to do it at all, you'd have to build and test a lot of dedicated circuitry before getting it right. A good mathematical model would be the way to start, and the way to obtain that would be by taking accurate measurements.

      I think electronic organs have a lot of potential as instruments, not only to sound like a pipe organ, but also to build on what a pipe organ can do. Unfortunately there aren't too many engineers working on this kind of thing because there is no money in it. Generally most purchases of electronic organs are made simply because they are cheaper than pipe organs.

    6. Re:Tracker Action by Galvatron · · Score: 1

      Will, what the hell is your problem? Look, I know you're upset about the fact that my girlfriend has chosen to stay with me, rather than dating you. However, spending all your mod points every time you get them to give me 5 "overrated" mods is just petty. Get over it, move on, there are other girls out there. We all have to deal with disappointment in our lives.

      --
      "The question of whether a computer can think is no more interesting than that of whether a submarine can swim" -EWD
  78. Imagine... by thelizman · · Score: 2, Funny

    ...a Beowulf Cluster of pipe organs playing Beowulf.

  79. Re:omfg by Webmoth · · Score: 1

    Especially when "ground zero" was 70-some stories in the air.

    Ever heard of "significant figures?" There's only one in 600. That means the measurement is really 600 +-50ft.

    --
    Give me my freedom, and I'll take care of my own security, thank you.
  80. Re:Stop, back up. by Eiki · · Score: 1

    Ahh - spatial placement, now THAT makes sense. Of course, that would also imply that each speaker is placed at a different height - maybe at the center of the "pipe" it represents. I wonder if golden ears could detect the fact that the sound comes more from a "point" than a "line".

    I agree with you about the bass, but that doesn't neccessarily require so many channels, just a couple of really powerful subwoofers, as mentioned in the article. By the way, is it true that the Passacaglia and Fugue in C Minor hits 16 Hz? Neal Stephenson used this fact (if fact it be) as a nice little gimmick in his very first novel _The Big U_ - it was enough to destroy buildings. :)

  81. Re:No. by Anonymous Coward · · Score: 0

    do you realize how disgusting that is? the person is dead. DEAD.

  82. Dare I say it? by MP3Chuck · · Score: 1

    Imagine a Beowulf cluster of those!

  83. Thank goodness by Anonymous Coward · · Score: 0

    Thank goodness this 74-channel pipe organ isn't connected to the net! Otherwise, it could be susceptible to the same vulnerabilities that befell GNU, GNOME, Debian, Gentoo, and FSF.

  84. You're not a musician are you? by FrostyWheaton · · Score: 1

    If it were possible to do a blind A/B test between the two organs, I would wager more than half of a general population sample, even more if you only used musicians, could Identify which was the Real pipe organ and which was the Linux clone, even if the room was full of wheezing seniors.

    This organ is nothing more than a (rather sophisticated) sample playback device with some rather nifty logic to choose it's samples well. This is the very reason it does an incomplete job of reproducting an actual organ sound, because it is incapable of recreating the full range of sounds accurately (emphasis on full).

    While I grant that very slight differences in pitch (440/441 is actually differentiable for most people) and volume (10db is virtually inaudible) are difficult to discern, that's not the issue. It's the overall timbre of the sound that humans can very easily distinguish. A soprano singing on stage sounds very different from a recording of that soprano being played from a speaker in the same spot. The same goes for a violin/guitar/trumpet/basoon/etc. And doubly so for electronic versions of the same.

    --
    Comments should be like skirts. Short enough to keep your attention, but long enough to cover the subject
    1. Re:You're not a musician are you? by _aa_ · · Score: 1

      I have to disagree that a soprano singing on stage sounds VERY different from a recording of that soprano being played in a speaker in the same spot. A bass drum and a gong sound VERY different. At best a live singer versus a recording of the same singer sound subtly different.

      Having heard neither the original pipe organ, nor the new one, I wouldn't care to wager on such a contest. However, you should consider that the general public thought milli vanilli actually sang their songs.

      Given that the entire goal behind this project was to reproduce the original, being unable to fool at least 50% of the regulars, let alone the general public, would classify the project as a failure. Given the following quote, I have to assume the creators consider the project a success;

      "Jackson, trained at Juilliard, says that the first time he played the organ, he had to stop as quickly as he started, as he was shocked by the organ's verisimilitude. Both organists defy even the most sensitive of ears to discern between a classic pipe organ and Trinity's new creation." -- from http://www.trinitywallstreet.org/news/article_255. shtml

    2. Re:You're not a musician are you? by shoor · · Score: 1

      I've read that humans can discern differences in
      pitch of about 6 cents (where 'cent' means 1/100th
      of a semitone). I've experimented with this and it
      seems to be true for me.

      --
      In theory, theory and practice are the same; in practice they're different. (Yogi Berra & A. Einstein)
    3. Re:You're not a musician are you? by Crazy+Eight · · Score: 1
      You have a point, but I think the lesson to be learned here is that traditional accoustic instruments have much more sophisticated effects on the listener than can be imagined by a simple consideration of the physics of harmonic motion.

      15 years ago I was a music student at a UC who had wormed my way into a graduate course in computer music. We worked with Csound on terminals hooked up to a VAX. Our brilliant though somewhat nutty prof had a soundproof listening room with monitor speakers and a Sun workstation. Given the tools and environment it was possible to recreate any sound possible. That's not a hyperbolic statement. It's a mathematical truism based on what I know about the Fourier transform and the nature of sound. To use a CS analogy, Csound is NP-Complete. Here's the rub. Acually making a computer recreate something like this organ -- even given a perfectly transparent speaker system -- is incredibly complicated, and the Organ should be one of the easiest instruments to emulate. This emulation is nothing to sneeze at. If it really has been done well enough to surprise a professional Juliard trained Organist then we should be surprised that it only took 10 desktops to pull off. As for the bass drum or gong...

    4. Re:You're not a musician are you? by mochan_s · · Score: 1
      Given the tools and environment it was possible to recreate any sound possible ... Acually making a computer recreate something like this organ ... is incredibly complicated

      What does that mean? Are you using recorded organ samples or is that by the physics of the organ?

    5. Re:You're not a musician are you? by Anonymous Coward · · Score: 0

      I *am* a musician, and I know a bit of what's going on behind the scenes here politically.

      This has caused rather a stir at the church; the organist is taking a lot of hot water for it, and it has been made clear that this is an *interim* solution. I haven't heard the organ myself, but my impression is that the congregation at large can tell the difference between it and the former organ; whether this is because the congregation knows that the organ is different or because there really is a difference is not clear.

      This sort of article, gushing over the fact that a trained organist can't tell the difference, is just spin - what you're looking at here is the press release about how fine the emperor's new clothes are, while most of the subjects are pointing and laughing at the naked emperor.

    6. Re:You're not a musician are you? by Crazy+Eight · · Score: 1
      By environment, I just meant that there was a recording studio type of environment to listen in. By the tools I meant Csound itself. The process of using it is like working with Povray. You're compiling/rendering text files into a sensation. What's possible has to do with the nature of sound. Anything you can hear can be reduced to sine waves. If you want to make a square wave you take the fundamental and add to it all of the odd harmonics. A FFT could do that in reverse. Suppose you mike a clarinet and hook it up to an oscilloscope. You'll see something square-like. If that scope ran a FFT you could break that signal down into it's constituent sine waves and see something like 500Hz, 1500Hz, 2500Hz, etc... Of course, the thing is a clarinet has a lot more character than that. There'd be some 1000Hz and 2000Hz too, just not as pronounced. The harmonics wouldn't be perfect either. Your 440 A might be spot on, but your second harmonic might be 881Hz depending on the instrument. There's the matter of relative amplitude too. IIRC, some instruments produce harmonics that are louder than the fundamental. Bells are so screwy that (IIRC) they have non-integer harmonics like 1.5 (is that an oxymoron?).

      Here's where we get to the notion a parent poster mentioned about the difference between a singing voice and a drum. Any sound that can be heard like a note is going to be made of sine waves that have some sort harmonic relation. Everything else is crazy shit when you break it down. Consider singing. The lyrics are delivered by the consonants. The melody is carried by the vowels. So then the question is: How do you describe "T" or a snare or a stop closing when you don't have that mathematic model to start with? That's what these guys were trying to do. The middle part of an organ note will have all that harmonic relation so you can loop a sample and get close to the real thing, but the begining and end are going to be nuts.

    7. Re:You're not a musician are you? by mochan_s · · Score: 1

      Wait a minute. If I wanted to make a square wave, then I add all the odd harmonics to it? There are an infinte number of odd numbers!!!!

    8. Re:You're not a musician are you? by Crazy+Eight · · Score: 1

      Damn straight buddy. Mathematically speaking they're all there. Of course, what makes it work in the real world is that we can't hear them above a certain frequency anyway and they have a 1/n amplitude where n is the harmonic in question. So even if the component isn't something only dogs can hear chances are it's relatively quiet anyway. This page has a cool animated gif showing the superposition of odd harmonics making a sine go square.

  85. Re:Jim Lord by Anonymous Coward · · Score: 0

    Are you sure that wasn't Rick Wakeman from Yes? Because he did that for the song "Awaken" on the album "Going for the One" (released in 1977).

    I think the rationale was that in 1977, truly high quality recording equipment was not portable and was not cheap. Back then, they tended to use things like 1 inch wide tape that ran at 15 inches per second. These tape machines were many, many thousands of dollars and not meant to be carted around. Also, back then the phone lines were analog and in some cases very good quality.

  86. Linux driving a church pipe organ? by Nybble's+Byte · · Score: 0

    Damned Linux religious zealots!

  87. Bah by srcosmo · · Score: 1
    Anybody can simulate a pipe organ...

    Hm, now where's that Soundblaster 8 clone with the non-wavetable MIDI I had lying around?
    I'm gonna go nab myself a piece of the market!

    --
    free speach
    Did you mean: free speech
  88. actually... by Anonymous Coward · · Score: 0

    'Ground Zero' was coined by someone else. Sorry. You were close though.

  89. sure would've been nice if... by DrewCapu · · Score: 1

    they made a sound font available for us to try. If anybody is curious about trying some sampled sound fonts, http://www.hammersound.net/ has a pretty good collection. My favorite organ sound font there is JEUX 1.4 found towards the bottom of this page.

  90. LinuxSampler plays your Organ samples for free by Anonymous Coward · · Score: 0

    FYI: LinuxSampler is under heavy development and you can already stream multi Gigabyte .GIG samples (in GigaStudio/Gigasampler format) directly from disk (without evenveloping yet but that will be added soon).
    If you can please join their mailinglist / development group.

  91. Biggest pipe organ in the world... by jotaeleemeese · · Score: 1

    Is in Passau in Germany. Google it, I am lazy and I just remembered I was there.

    What about other interesting tidbist like oldest, loudest, etc.?

    --
    IANAL but write like a drunk one.
  92. Heh hehe hehehehe heh hey Beavis... by richy+freeway · · Score: 1

    ...he said organ. ;)

  93. Passau in Germany... by jotaeleemeese · · Score: 1

    ... claims the "their is bigger than the Danish'"....

    --
    IANAL but write like a drunk one.
  94. Shurely by pommiekiwifruit · · Score: 1
    Saint-Saens #3 (organ). Mind you that needs an orchestra as well as the organ. And good timing to keep them in sync (some organs have 2 seconds lag time).

    Bach's Tocatta and Fugue in D minor is cool but not so booming (I do like the Gyruss remix though).

  95. Re:No. by Anonymous Coward · · Score: 0

    do you realise it's a cartoon? A CARTOON.

    Yeah, the Japanese are sick, so what.

  96. That will make Waterhouse happy by Jayman2 · · Score: 1

    I guess Waterhouse would be jumping with joy over the reintroduction of pipe-orgain into computing :-)

    --
    -.sig sauer-
  97. Re:Stop, back up. by ContraB · · Score: 1
    By the way, is it true that the Passacaglia and Fugue in C Minor hits 16 Hz?

    Depends on the instrument you play it on. Your church around the corner almost certainly doesn't have a pipe that can play that pitch. (Unless you live around the corner from Trinity National Cathedral in Washington DC.) So you can play Passacaglia and Fugue in Cm on that organ but never hit anything near that note.

    In Bach's time, a typical pipe organ's lowest pitched stop was 16', a pitch around 30 Hz. Only an exceptionally large, unusual instrument of the period had a 32' pitch, which can hit 16 Hz. Certainly Bach wasn't composing with 32' ranks of pipes in mind. An organist can choose to play Bach with these stops, though he's taking some artistic license to do so. (Not that I mind, it sounds really neat!)

    --Thad, who knows his organs! ;)

    --

    -=-=-=-=-=-=-=-=-=-=-=-=-=-=-
    Much like a newborn puppy...
  98. Re:Stop, back up. by Eiki · · Score: 1

    Thanks for the knowledge. Pity that I live in Florida, which must surely be thin on such instruments.