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How The THX Noise Was Created

devilsbrigade writes "The blog MusicThing is running an interesting interview with Andy Moorer. Mr. Moorer is the man who created the sound called Deep Note, now heard in every THX-enabled movie theatre. The interview is originally from last year, but the tech-heavy discussion is still a timeless analysis of a great sound." From the article: "The score consists of a C program of about 20,000 lines of code. The output of this program is not the sound itself, but is the sequence of parameters that drives the oscillators on the ASP. That 20,000 lines of code produce about 250,000 lines of statements of the form "set frequency of oscillator X to Y Hertz. The oscillators were not simple - they had 1-pole smoothers on both amplitude and frequency. At the beginning, they form a cluster from 200 to 400 Hz. I randomly assigned and poked the frequencies so they drifted up and down in that range."

65 of 243 comments (clear)

  1. Now the art is by Too+many+errors,+bai · · Score: 5, Funny

    to turn that sound into an onomatopoeia. Any takers? "Bhhwuhhhhhhhhhhoooooh"

    1. Re:Now the art is by im_thatoneguy · · Score: 3, Funny

      "NEEEERRAAAOOOWWWWWUUUMMMMMMMMMM"

      was how I was always told to spell it in Kindergarden.

    2. Re:Now the art is by GundamFan · · Score: 2, Funny

      A comment modded funny that actualy made me laugh... Wow this moderation thing may actualy work.

      --
      I don't give a damn for a man that can only spell a word one way.
      Mark Twain
    3. Re:Now the art is by VValdo · · Score: 2, Insightful

      "NEEEERRAAAOOOWWWWWUUUMMMMMMMMMM"

      No, no. You're confused. That's the old Current Affair sound...

      W

      --
      -------------------
      This is my SIG. There are many like it, but this one is mine.
  2. pfft ... 20k lines of C by Anonymous Coward · · Score: 5, Funny

    could've done it in 5 lines of perl

    1. Re:pfft ... 20k lines of C by dgatwood · · Score: 2, Funny
      Could've done it on 5 lines of C... and a very large data file, of course....

      --

      Check out my sci-fi/humor trilogy at PatriotsBooks.

    2. Re:pfft ... 20k lines of C by gkwok · · Score: 3, Funny
      That sounds about right.
      use MPEG::MP3Play;
      my $mp3 = new MPEG::MP3Play;
      $mp3->open('deepnote.mp3');
      $mp3- >play;
      $mp3->close;
    3. Re:pfft ... 20k lines of C by Ossifer · · Score: 2, Funny

      I wonder how many lines of C it takes to THX-encode an entire 2-hour movie...

      I didn't realize Hollywood enployed so many coders...

    4. Re:pfft ... 20k lines of C by Ossifer · · Score: 3, Funny

      It's called "humor", Gavin...

  3. I always thought it was by Orrin+Bloquy · · Score: 5, Funny

    THEEEWWWWAANNNNNNNNGGGGGGGGGG

    You know, a slowed down version of the sound of what happens after George Lucas unzips his fly.

    --
    "Made up/misattributed quote that makes me look smart. I am on /. and I must look smart."
    1. Re:I always thought it was by eclectro · · Score: 2, Funny

      THEEEWWWWAANNNNNNNNGGGGGGGGGG

      George Lucas is filing papers against you for copyright infringement for using the THX(tm) sound in your post.

      He's doing it using the loose change that dropped out as he was unzipping his fly.

      --
      Take the cheese to sickbay, the doctor should see it as soon as possible - B'Elanna Torres, "Learning Curve"
  4. This Is Very Old by Anonymous Coward · · Score: 2, Funny

    This was posted a long time ago...what's next? Bell makes phone call?

    1. Re:This Is Very Old by nurd666 · · Score: 5, Funny

      Ug Make Fire! Story next on RockDot.org

  5. They created it by by geekoid · · Score: 5, Funny

    recording the sound inside my head when my former wife talks.

    --
    The Kruger Dunning explains most post on /. http://en.wikipedia.org/wiki/Dunning%E2%80%93Kruger_effect
  6. Some tangential "Deep Note" trivia by doesitmakeitsick · · Score: 5, Interesting
    This always amused me: http://www.benedict.com/Audio/dre/dre.aspx When the Napster maelstrom hit the recording industry, Dr. Dre, along with Metallica, was one of the first to hurl accusations of copyright infringement at the popular file sharing site.

    Dr. Dre is furious that people are using Napster to download his song "Lolo" without permission or license - an obvious "copyright infringement". The irony is that the prominent feature of that song is a sound that Dr. Dre appropriated without permission or license - an obvious "copyright infringement"?

  7. Yeah but... by jlramirez · · Score: 2, Funny

    how much of them lines are gotos?

    --
    "Me claiming Satan exist is just as valid as you claiming an atom exists" - 1inChrist
  8. Could you add one more line of code by Unknown+Poltroon · · Score: 4, Funny

    to please for the love of god turn the damn thing DOWN A NOTCH?!?!?!

    --
    All Troll + "offtopic" mods are meta moderated as "Unfair", because you abused the system.
    1. Re:Could you add one more line of code by R2.0 · · Score: 3, Funny

      The first time I heard the sound was the first run of "Die Hard" in a brand new theater. they started with closing the curtain, and sloooowly opening it accompanied by the sound. In the awed silence thast followed, I said loudly and distinctly "Big deal!".

      My date was mortified; still got laid, though.

      --
      "As God is my witness, I thought turkeys could fly." A. Carlson
    2. Re:Could you add one more line of code by animaal · · Score: 5, Funny
      My date was mortified; still got laid, though.


      Do you know for sure that she got laid? She might only have told you she did out of spite ;)
    3. Re:Could you add one more line of code by jleq · · Score: 2, Insightful

      still got laid, though.

      You don't belong here. Move along.

  9. I like the THX signature sound so much... by E-Lad · · Score: 5, Funny

    That depending on the movie that follows it, that sound is the best part of the sitting.

  10. Blasting Speaker Noise by zippthorne · · Score: 4, Interesting

    Their stated goal was to demonstrate the clarity or depth or somesuch without being overpowering..

    However every theater I've been in with THX has for some odd reason put the audio level up to 11 to "enhance" the effect. So instead of a nice clean silly-sound followed by a clear and rich sound, I am treated to the sharp buzz of overmod followed by the grating pops of briefly exceeding the specifications of the speakers during the exciting parts of the films.

    Fortunately, home theaters are cheap and it is quite easy to peg the audio at a level that doesn't stress the speakers. But it's a sad commentary when $60 walmart home theater has better sound than the real thing simply because some undertrained lacky failed to properly adjust the sound levels.

    --
    Can you be Even More Awesome?!
    1. Re:Blasting Speaker Noise by Quikah · · Score: 4, Informative

      Submit a complaint to THX, if they get enough they will check the theater and revoke their certification if things are not up to snuff.

      http://www.thx.com/mod/cinema/survey.html

      --
      Q.
    2. Re:Blasting Speaker Noise by Locke2005 · · Score: 5, Funny
      Their stated goal was to demonstrate the clarity or depth or somesuch without being overpowering...

      But there actual goal was to get everybody in the theater to SHUT THE FUCK UP and listen to the movie, which requires a burst of sound so loud that nobody can talk over it.

      --
      I've abandoned my search for truth; now I'm just looking for some useful delusions.
    3. Re:Blasting Speaker Noise by Hao+Wu · · Score: 2, Interesting

      I have not fretted over any movie's sound since learning that Stanley Kubrick preferred mono for his films. To many great masters the message contains the inspiration, while the media is a distraction.

      --
      I suggest you read Slashdot
    4. Re:Blasting Speaker Noise by Silver+Gryphon · · Score: 4, Insightful

      If only mod points went to 11...

      Volume has to be the most irritating problem in a movie theater. Granted, the 14 year old lackeys don't give a rat's ass what they set it at, but if enough people complain through the THX survey, those 14 year old lackeys will be the most educated in town on the definition of 'audiophile.' THX will work hard to preserve its reputation vs. DTS and competitors. They'll come down hard on theater management, who will have no choice but to train and weed out failing staff. With keeping a uniform or theater clean, or keeping food safety in mind, a theater's reputation spreads. So too does "that theater's too loud, let's go to the one across town."

      I had no idea until now that THX had a public survey. I'll have to use it.

  11. Brown note... by GillBates0 · · Score: 4, Funny
    I randomly assigned and poked the frequencies so they drifted up and down in that range."

    No luck finding the Brown note, I presume? Somehow "poked" and the "brown note" bring colorful images to the mind.

    --
    An Indian-American Hindu committed to non-violent thought/speech/action alarmed by the global explosion of radical Islam
  12. And I always thought by Rooked_One · · Score: 2, Funny

    it was just the movy skreen starting up. Don't they run on 8 cylenders ?

  13. On Purpose? (Temporal Masking) by slashbob22 · · Score: 4, Interesting

    Much like some of the methods of lossy compression (Temporal Masking). Maybe the point is to provide a loud sound such that your ears cant really distinguish the crappy audio afterwards -- I do realize that temporal masking is generally on the scale of milliseconds. But maybe they know something we don't.

    --
    Proof by very large bribes. QED.
  14. Doing it the hard way. by Anonymous Coward · · Score: 3, Insightful

    This is why there as still so many fans of programs like c-sound, pure-data, jmax etc.
    Nothing beats creating a sound from scratch.
    It takes a lot longer than pressing a preset button on a synth. :(

    An instrument like a guitar is simple in a way, but with practice, people get so many sounds from it. C-sound is a bit like that too, you start off just making beeps and then eventually it sounds a bit like music.

  15. er, um... by hackwrench · · Score: 4, Funny

    where exactly did you go to kindergarden?

    1. Re:er, um... by Dirtside · · Score: 3, Funny

      Probably at the Death Star's day care center.

      (I couldn't find the original link at The Onion, alas.)

      --
      "Destroy science and religion. Science would re-emerge exactly the same; but not religion." - Penn Jillette, paraphrased
  16. Wow! A one pole smoother... by Weaselmancer · · Score: 3, Informative

    Occasionally called a resistor and a capacitor.

    --
    Weaselmancer
    rediculous.
  17. THX, DTS, etc. by demonbug · · Score: 3, Interesting

    I was trying to remember the first time I heard the "Deep Note", but couldn't. The only thing I could think of was "The Digital Experience" intro at the beginning of Jurassic Park (I think the first or at least one of the first movies released using DTS), but I don't think that was quite the same thing. Really cool though, and it was a great opening for the bone-rattling bass in that movie. Anyone know what the first thing the "Deep Note" was attached to?

    1. Re:THX, DTS, etc. by blackraven14250 · · Score: 5, Funny

      Probably the THX logo.

    2. Re:THX, DTS, etc. by kaptron · · Score: 3, Interesting

      According to the link, Return of the Jedi was the first. Of course, I never made it that far in the theater myself, I got scared by a Friday the 13th trailer and went to see another movie (this was the 1985 ROTJ re-release when I was almost 4 yrs old).

      But I do distinctly remember the Jurassic Park DTS intro... it seems like around that time was when Dolby Digital, SDDS, etc, surround sound intros started becoming really prominent. I had always thought that the THX intro was a lot newer than 1983 myself, but what do I know.

  18. So, in other words ... by ScrewMaster · · Score: 4, Funny

    I randomly assigned and poked the frequencies so they drifted up and down in that range.

    He fiddled with it until it sounded nice.

    --
    The higher the technology, the sharper that two-edged sword.
  19. it can't be that complicated... by ALpaca2500 · · Score: 4, Funny

    How'd you make this crunching noise, in this part of the song, here?

    Well, it's, it's really a combination of... I used celery. I broke celery sticks, and then pitched it down, and I added lots of reverb. I guess I'm giving away some trade secrets here.

    But nobody will ever really know exactly how much celery you used.

    I also added corn starch, and then we went and crashed our van. And recorded that. And I mixed it in.

    It sounds incredible.

  20. Simpsons by PoitNarf · · Score: 4, Funny

    My favorite use of this sound was in a Simpsons episode. Video here:

    http://media.putfile.com/The--Simpsons--THX--Parod y--DIVX

    --

    "0101100101? It's just jibberish. *looks in mirror, gasps* 1010011010@!? AHHHHHH!!"
  21. Links to the original THX sound by theurge14 · · Score: 4, Informative

    Here's a good place to get them. Apparently there have been some variations over the years:

    http://www.digital-audio.net/sounds_o.shtml

  22. Many Variations on a theme. by LibertineR · · Score: 4, Interesting

    I've got a Home Theater Calibration DVD that contains all the recent variations of that THX sound. They made dozens of them. The coolest one? The one made for the movie Aliens, by far. I think they did a few for the Star Wars movies too, and other movies where sound quality was paramount. (no pun intended) It cost a ton of money to get my theater to the point where it sounded just like a cinema, but now it is sometimes the highlight of the movie watching experience. Which says a lot about the quality of movies these days. Only the overhead rumble of the first Star Wars movie matches that THX sound clip in its viceral sound impact, along with the opening segment of Top Gun with the subwoofer cranked up.

  23. I bet he's a real party anmal by Linker3000 · · Score: 4, Funny

    I can imagine Mr Moorer is a real chick-puller at parties:

    "Hey, I invented this really really famous sound - it goes like...well..actually I have it here on my iPod, or you can come back to my place to hear it on my home theatre if you want? Here take this copy on CD, it's free..."

    Think Rick Moranis in Ghostbusters!

    --
    AT&ROFLMAO
    1. Re:I bet he's a real party anmal by Khaed · · Score: 2, Funny

      Think Rick Moranis in Ghostbusters!

      Yeah, but then when he gets them home he's screwed because he locked himself out...

    2. Re:I bet he's a real party anmal by AMoorer · · Score: 2, Funny

      The last time I tried that, the lady looked at me blankly. It turns out there is not a single THX theater within 150 miles of the town she lives in (Tallahassee, FL).

  24. TODO: log random number generator seed by natophonic · · Score: 5, Interesting
    Some months after the piece was released (along with "Return of the Jedi") they lost the original recording. I recreated the piece for them, but they kept complaining that it didn't sound the same. Since my random-number generators were keyed on the time and date, I couldn't reproduce the score of the performance that they liked. I finally found the original version and everybody was happy.
    Whew!

    I was in a somewhat similar spot a few years back, where a script I'd written to generate random data for load testing a server, used date and time as a rand() seed. One set of data I generated uncovered a weird threading issue, and it was pretty reproducible with that dataset. Then a disk crash wiped the dataset. I still had the script, but couldn't seem to get another dataset that would repro the issue.

    In addition to being better about backups, I now log whatever random seed is used to generate a dataset like that.

  25. Re:Wow! A one pole smoother... by dmiller · · Score: 4, Insightful

    except when you are in the digital domain.

  26. Found the right line.... by technoextreme · · Score: 2, Funny
    Who put the bop in the bop shoo bop shoo bop?
    --
    Ooo man the floppy drive is broken. No wait. The computer is just upside down.
  27. I know what it really is. by blair1q · · Score: 3, Funny

    They put a lavalier (wireless microphone) on Lucas and followed him around for a day-in-the-life thing, and at one point he pulled out his wallet and opened it.

    So they sampled that, air-balled it once, and patented it.

  28. Super Mario World's keyhole sound by tepples · · Score: 4, Funny

    deepnote.mp3: No such file or directory (ENOENT)

    I would plug in Super Mario World (either on cartridge or on an emulator), head to Donut Plains, grab the cape, fly up near the end of the stage, and stick the key in the hole. This causes the game to play a humorous sped up version of "Deep Note".

  29. MythBusters busts it by tepples · · Score: 3, Interesting
  30. Here's how it *really* went down by popo · · Score: 5, Funny

    George Lucas: How'd you make that sound Andy?

    Andy Moorer: We electrocuted a sperm whale.

    George Lucas: God damn that sounds great.

    Andy Moorer: [Giggles} I *know*

    George Lucas: Thing is... we need a story that's not going to bring those Greenpeace punks down on top of us.

    Andy Moorer: I coded the sound with 20,000 lines of C?

    George Lucas: Nice. Let's go with that.

    --
    ------ The best brain training is now totally free : )
  31. Blasphemey by iamlucky13 · · Score: 2, Funny

    I'm pretty sure you're supposed to be obsessed with Ruby on Rails this week. You're like 4 coding fads too late (perl, php, python...).

    Now I'm just going to sit back and wait for somebody to tell me I'm wrong and it could be done in 3 lines with AJAX

  32. Re:Two words: Styx & Krakatoa by colenski · · Score: 2, Informative

    Five words: A Day In The Life

    Sheesh, man, learn your rock history. Styx wasn't even close.

  33. Re:Two words: Styx & Krakatoa by Anonymous Coward · · Score: 2, Interesting

    please, both of you learn your history.. Iannis Xenakis in 1953

  34. Something cool to try... by martinultima · · Score: 2, Interesting

    If you can find an MP3 (or Ogg Vorbis, or FLAC, or WAV, or...) copy of "Deep Note," try playing it backwards and/or at various different speeds. If it's played at around 14x the original speed it actually sounds sorta neat. And backwards it sounds like a nuclear reactor going down.

    (Uh... not that I'd know what a nuclear reactor would sound like... yeah, uh, you can get back to dealing with Iran now...)

    --
    Creative misinterpretation is your friend.
  35. Obligatory Grandpa Quote by Robber+Baron · · Score: 2, Funny

    "Turn it up!
    Turn it uup!"

    --

    You're using her as bait, Master!

    1. Re:Obligatory Grandpa Quote by ZeroExistenZ · · Score: 2, Funny
      --
      I think we can keep recursing like this until someone returns 1
  36. Re:Two words: Styx & Krakatoa by AMoorer · · Score: 5, Informative

    Actually, I thought I was ripping off the end of the Beatles' "Day in the Life". I never heard the Styx&Krakatoa version. I always say when you rip, rip from the best!

  37. Re:Two words: Styx & Krakatoa by cnerd2025 · · Score: 2, Interesting

    Wasn't it called an "orchestral freak out". I actually thought of the same thing. Besides, it ends with the chord that sounds conspicuously like the Macintosh boot chime (I guess that's the source of the bitter fight between Apple Computer, Inc. and Apple Corp.) Now I read about this Xenakis guy. Fascinating...

    I guess we could even bring up Johann Sebastian Bach, who is widely regarded as among the most brilliant (if not the most brilliant) composer of all time. Bach's works have been analyzed for mathematical excellence as well as aesthetic pleasure.

  38. Have a listen... by lax-goalie · · Score: 4, Informative

    For those who want to give it a listen, the trademarked THX sound is available on the USPTO's web site here.

    They have a whole bunch of others here. It's kind of a fun page to click around on.

  39. He was a Gentoo fan... by Schraegstrichpunkt · · Score: 3, Funny
    how much of them lines are gotos?

    None of them. Not a single one. I'd guess that there probably isn't any branching or looping logic in the entire program...

    Talk about -funroll-loops!

  40. Or you could just use your voice! by dea9 · · Score: 2, Funny
  41. Re:OMG! Welcome to CompSci101: Intro to Algorithms by Viking+Coder · · Score: 3, Insightful

    First off, if you RTFA, this guy worked at Stanford in Artificial Intelligence. You don't get to do that, if you're as dumb as you imply he is.

    You also have no idea how many lines of the 20,000 are data tables. Note the part where he says "the frequencies of the big chord (which had been typed in by hand - based on a 150-Hz root)..."

    I'll tell you what: I'll give you 4 days to write your 5 lines of Perl. When it executes, it should algorithmically create (not download off the internet, or some bullshit) a wav file which 8 out of 10 people can't distinguish from 'Deep Note' based on a side-by-side sound test. If you succeed, I'll send you $300 through PayPal.

    Until then, STFU. Some of us are trying to enjoy the show.

    --
    Education is the silver bullet.
  42. Re:Wow! A one pole smoother... by PenguiN42 · · Score: 2, Insightful

    They exist, but i dunno how common they are these days

    That's it. You've done it. I officially feel old now.

    --
    The following sentence is true. The preceding sentence was false.
  43. Re:20,000 lines of code??? by AMoorer · · Score: 2, Informative

    Gee, you are absolutely right. I went back and looked at it - it is only 325 lines of C code! Gosh, I remembered it as being huge, but it is only about 12 pages printed out. That's what I get depending on a 20-year-old memory. Sorry about the mistake.