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User: Technician

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  1. Re:24/96? on Speculation On a Lossless iTunes Store · · Score: 1

    but a 22.05 khz sine wave sampled at 44.1 comes out as a triangular wave at best - meaning information is lost.

    Who cares? Most speakers are unable to move to reproduce the harmonics of 22.05 KHZ signal. I don't know of any commercial speaker system to have drivers for frequencies above the tweeter. I suppose you could add in some Pizo transducers from very old TV remotes (yes some from the 60's and 70's used 40 KHZ audio for the remote) to extend the range. Then find an amp that will work above 30 KHZ. I have an old HI-FI amp with the main spec'ed to 100 KHZ within 2 DB, but these are rare.

  2. Re:"exploding" on Tunguska Blast Was a Small Asteroid · · Score: 1

    But the all the momentum they transfer to the air creates a very devastating shock wave.

    The momentum was only part of the blast. The sudden heating from the release of lots of kinetic energy created an expanding blast fireball not unlike a nuke event. This was not just a sonic boom. This was a superheated fireball explosively expanding with a momentum toward the ground.

  3. Re:Office 2007 made the list? Seriously? on Vista Named Year's Most Disappointing Product · · Score: 1

    The early Macs made computing intuitive because all you had to do was look around in the menus and figure out what they did. You learned tricks and shortcuts that remain in place to this day.

    The early Macs were mostly intuitive. There was only one thing I found non-intuitive that I needed help on; How to eject a floppy. I didn't want to delete the data, I just wanted to eject the disk. Throwing data you wanted to keep in the trash was not intuitive. Other than that, the Mac was very intuitive.

  4. Re:let's take a tour of the Nyquist sampling theor on Speculation On a Lossless iTunes Store · · Score: 1

    Well, not entirely. You see, if the source material contains frequencies above 22.05kHz, they will end up "aliased" onto another part of the frequency spectrum. In short, the extra high-end becomes noise. Information is lost.


    Aliasing is noticable on most CD players I have tested. It is measureable and is most common in the range of 14KHZ to 22KHZ. To test it yourself, get a DDD created sweep test CD and play it. As as the sweep goes up, the diffrence frequencies come down and is plainly heard as decending tones in the sweep. It is quite visiable in a scope display. I know this from years in the consumer electronics industry. I used to sweep systems. I could not use the test CD for a pro sound studio setup due to the artifacts in playback unless the studio was for vocal range only from 100HZ to 12 KHZ. For recording brass instruments, I had to use a digital sweep source for certification other than a CD as a CD player was not up to par for pro studio work.

    This is one of the best test CD's produced. It is all digital except the live samples.
    http://www.amazon.com/Denon-Audio-Technical-Various-Artists/dp/B0000034ME
    List all tracks to get to track 65, the sweep tone.

    You can listen to the sweep signal online. The artifacts are fun in the online compression. This is one of the few test signal CD's that start at 5 HZ.

    Just watch the limited bandwidth and compression eat this test signal alive online. Remember, this is a digitaly created source signal. Any dropouts and roll-off and artifacts is in the compression and playback. Check out track 65 for a 5 HZ to 22KHZ digitaly created and ruller flat in amplitude. This will acid test your equipment.

    A FLAC of this CD is lossless and has the same response as the original CD.

  5. Re:Oversampeling a digital signal on Speculation On a Lossless iTunes Store · · Score: 1

    I've had audiophiles* just snub their noses at mathematical proof and regrettably inform me that I do not have "the golden ear." I wonder if there have ever been any research on whether self proclaimed audiophiles REALLY have magical hearing.

    I always laugh at these idiots who have no grasp of the technology. When sampeling an analog waveform, the more the better. When copying a digital signal bit for bit is perfict. Someone care to redefine lossless? Why sample 24 bits/sample when the digital source is 16 bits? Why not do a lossless copy bit for bit of the original 16 bit source?

    "Bit rate = 44,100 samples/sec × 16 bit/sample × 2 channels = 1,378.125 kbit/s (10.09 MByte per minute)"

    http://en.wikipedia.org/wiki/Red_Book_(audio_CD_standard)

    Just send me a FLAC of the original CD and I'm happy.

  6. Re:Office 2007 made the list? Seriously? on Vista Named Year's Most Disappointing Product · · Score: 1

    But then again, maybe that's because I'm more adaptable. The people at PC World appear to be fogies, with their complaint about Office 2007 being the ribbon. They're probably the same kind of people who needed a seminar in order to figure out what all those little buttons across the top 10% of the screen are supposed to do in Office 2003, and had no clue that they also were in the menus until a second seminar.

    You also got some training for the stuff that wasn't intuitive. For example, if you din't know the print menu was hidden in the big Windows Logo, how long would it take you to find the print menu, say you wanted to print on the color printer instead of the default laser? It took my wife 2 weeks of changing the default printer in Windows to select printers for Office 2007. A Google search finaly let me know the Windows logo was a button with the print menu. This is one example of things that are not located where they are in every other Windows program. File - Print.. there in all programs except Office 2007. This is only one of several learning curves needed just for the new Office suite.

    Back to Vista, how long would it take you to connect to my CUPS networked printer at \\192.168.1.102\lp1? It took me a while to find where to plug in the printer address. It gets split onto 2 dialog windows to enter all the parts of the address unlike any other OS I have.

  7. Re:The color picture tube on Vista Named Year's Most Disappointing Product · · Score: 1

    Personally I am not a vista fan, and I love *X, but this article seems too prejudiced.. the list contains major developments, now I think invention of the color picture tube by Philips would be on their most dissapointing list when it was invented.. cause its .. blah blah blah..

    I remember that year and the first sets that came out. I can see the parallel. It was horribly expensive, the programs were not in color, but some of the commercials were. Big deal, pay a lot to see some commercials in color.. not worth the upgrade. I grew up watching The Wizard of Oz every year. After I joined the Navy, I finaly saw it in color. The big suprise for me was the witch wasn't deathly charcoal grey. She was bright green.

    Unlike Vista which has some backwards problems with some programs, the color TV would play the old B&W movies just fine.

  8. Re:The cascading decline and DRM on Riding the Failure Cascade · · Score: 1

    I don't usualy reply to AC posts.

    How does fewer people buying CDs lead to still fewer people buying CDs?

    When I was in the service in the peak of my pirating days, we lived in the barracs (Dorm) and it was from all the great music I was explosed to that I copied (made mix tapes) and became a fan of a few artists of which I bought albums (pre CD LP's and tapes). Without the sea of great music in the barracs, I would have been exposed to very little interesting music and would have bought even less. I would have taken no interest in upscale stereo equipment and would have been just fine with a portable FM radio for the drivle they broadcast locally.

    It was the exposure to the albums that never got airtime, or only got the hit track played is what got me into buying music. Otherwise Queen would consist of Bohemian Rapsody, Eagles would be Hotel California, and Pink Floyd would be Another Brick in the Wall. If there were no albums in the area, then I would have bought very few.

    I found out I wanted a copy of Dark Side of the Moon and Wish You Were Here, but I would pass on Animals.

  9. Re:Reading and understanding the article.. on Electricity Over Glass · · Score: 1

    Power is still power. Whether you're pumping 100 mW of electricity or light into a fuel tank, I don't see a difference.

    There isn't much diffrence between feeding 100 mW opticaly or not.

    "where electromagnetic interference is more than just an inconvenience"

    Feeding 100 mW sensor and getting a 50 nW signal back with 25 mW of induced ground radar or cell telephone signal on top is the problem. It swamps the signal. In extreme cases such as a close lightning strike, the induced power could be enough to create a spark. The optical is for noise rejection and less for fire safety.

    "Already, a Photonic Power device is replacing instrument transformers used in the power grid to measure high currents."

    The optical in power substations doesn't have insulation breakdown failures in a lightning strike.

  10. Re:alternative DNS on Ye Olde World Charm · · Score: 1

    Searchq is ignored by Google. The next few things are obfuscation too.

    I use filtered DNS. When these pesky links show up, and still require a DNS lookup, the filtered DNS takes care of it for me. It is good for most stuff that is NSFW. As a bonus, it filteres most phishing and malware servers. I love these guys.

    http://lifehacker.com/software/security/block-porn-and-more-with-scrubit-240213.php
    http://www.scrubit.com/

  11. Re:Is she going to sue MediaSentry? on RIAA Backs Down On "Unlicensed Investigator" · · Score: 1

    In item 4 of the settlement may make it impossible for her to persue Media Sentry.

    Any challange of the validity either directly or otherwise may be in violation of the terms of the settlement. I think she is doing good to delete her files, cancel her internet account or prohibit anyone from using her connection including family members, and walk away.

    Making a contribution to the EFF may even be in violation of the terms. That sucks!

  12. Re:Has anyone actually USED Vista? on The Advantages of Upgrading From Vista To XP · · Score: 1

    Yes, the secpol change to "LM and NTLM - use NTLMV2 session security if negotiated" should be better documented, but once you knew about, how long did it take to change?

    It didn't take much time to change. It took quite a while to figure out what the problems were. Everything from an ancient Widnows 95 laptop, a Windows Me box, a Windows 98SE box, 3 Linux boxes and an XP box could all log in and use the NAS, but the Vista machine failed to log in. It wasn't like I'd never connected to the NAS before and was doing something wrong. There was something wrong with Vista, but what?

    I also hate to say it, but my home cheapo Samsung shared printer - which shares to my wife's Mac and my Fedora Core 6 server - took about another fifteen seconds to hook; I went via cups and changed the printer name on their computer.

    What is this cups thing on Vista you speak of? If you are talking about re-naming the printserver, I am using a hardware printserver. It works with everything just fine. Figuring out how to properly enter \\192.168.1.102\lp1 in Vista was the hard part. You have to break down the address and enter it in pieces properly on 2 dialog screens. It was not intuitive like it was in Linux or any other version of Windows.

  13. Re:Did I miss anything? on What is Bill Gates Learning From Open Source? · · Score: 1

    Yes, Widows CE so you can parse the logfiles on the road using your WiFi connection.

  14. Re:Has anyone actually USED Vista? on The Advantages of Upgrading From Vista To XP · · Score: 1

    SO has anyone actually USED Vista? What am I doing right/wrong that I have NOTHING to complain about it?

    You are using it in a 100% Windows walled garden. I bought by wife (i know, geek, wife, wtf?) a new laptop with Vista for her schoolwork. I had just a couple simple tasks to perform to finish up the setup.

    1 connect to the backup NAS and copy her files.
    http://www.simpletech.com/commercial/simpleshare/
    2 Connect to our networked printers.
    http://www.hawkingtech.com/products/productlist.php?CatID=21&FamID=42&ProdID=223

    The first task took over 2 hours and a massive Google search. The second task took a little over an hour to connect the first printer. The second went a lot faster.

    Vista by default has changed the security level (a feature) but it isn't well docummented, so when connecting to a Simple Share NAS box I couldn't log in. It requires a registry tweak to back down the security level to enable logging in and transferring files.
    http://blogs.msdn.com/chkdsk/archive/2006/03/10/548787.aspx
    http://www.builderau.com.au/blogs/codemonkeybusiness/viewblogpost.htm?p=339270746

    The second was a 5 minute task in Ubuntu for a complete noob. I used a stand alone printserver hanging on the back of my inkjet and laserjet printers to provide CUPS networking for my printers. In Ubuntu, it was easy to put in the IP address \\192.168.1.102\lp1 and pick a printer. It was intuitive to pick network printing and put in the printer address. In Windows it took quite a while to figure out how to do internet printing without a directory services server.

    It was far from easy for a Vista noob.

  15. Re:Jesus, give it up with the DRM already! on The Advantages of Upgrading From Vista To XP · · Score: 1

    So... what program do you use to rip DVD's to AVI? I haven't found a single one that operates satisfactorily.

    I use Acidrip with Mencoder. Unfortunately, it doesn't run on Vista.

    http://untrepid.com/acidrip/
    http://sourceforge.net/projects/acidrip/
    You will require the DVD non-free libdecss library for commercial DVDs.

    You can driectly set the output size, so ripping to a video Zen or iPod is a breeze.

  16. Re:Note to self.. Bios date change.. on Encryption Passphrase Protected by the 5th Amendment · · Score: 1

    Of course, if there were indications that someone has recently used their encrypted partition, folders or files recently, that would be different. A recent time stamp on the file or folder would be one such clue.

    Note to self; disconnect the network cable, reboot into bios, change bios date 10 years, write encrypted file from live CD, reconnect network cable, reboot.

  17. The cascading decline and DRM on Riding the Failure Cascade · · Score: 2, Interesting

    I wonder if the RIAA and MPAA will figure out that DRM and huge lawsuits with huge awards simply results in a cascading decline of their products as customers become upset and leave.

  18. Re:Battle of HOTH!!! on Ch-Ch-Chatting With the South Pole's IT Manager · · Score: 1

    Speaking of the antenna I had to read the caption twice. I was under the impression that geostationary satellites were below the horizon. On the re-read, I caught the fact that it is geosynchronous. That explains the platform and the stuff stored on one side of it. The dish tracks a satellite that rises, passes overhead and then sets on the other side and reaching the horizon almost at the same place from where it rose. The track is the same everyday so tracking can be a simple programmed pass. (Polar geosyncronus satellites make a giant figure 8 ground pattern passing the same equator point in both directions.)

    "This nine-meter diameter antenna points nearly horizontally toward the horizon to pick up geosynchronous satellites. Most communication to and from the South Pole travels over satellite."

    The dish appears to be parked waiting for the bird to rise on it's next pass.

    I looked for a map of a geosynchronous polar orbit but I found this other map instead. It doesn't have to be a polar orbit to be geosynchronous and not geostationary. A polar orbit would pass overhead. A tundra orbit would be reachable by this antenna, but would never pass directly overhead. These tracks would explain why the dish never collided with the storage tank on the platform.

    http://images.google.com/imgres?imgurl=http://bp3.blogger.com/_s8-JRf_hfrk/Rcu2CTjlAHI/AAAAAAAAACA/6eKz9MsIuHs/s400/Tundra2.gif&imgrefurl=http://satelliteradiotechworld.blogspot.com/2007/02/xm-files-another-patent-application-to.html&h=400&w=285&sz=125&hl=en&start=117&tbnid=2bPEixhyi9-PlM:&tbnh=124&tbnw=88&prev=/images%3Fq%3Dgeosynchronous%2Bpolar%2Borbit%2Bground%2Btrack%26start%3D108%26gbv%3D2%26ndsp%3D18%26svnum%3D10%26hl%3Den%26safe%3Doff%26sa%3DN

  19. Re:The content is fingerprinted.. on Record Labels Change Minds About Sharing MP3s · · Score: 1

    So is there anything I can do while writing the song to minimize the risk of being bankrupted by "a legal challange"?

    Yes, Never become popular and make it on the charts. ;-) For most Slashdotters this isn't an issue.

  20. Re:The content is fingerprinted.. on Record Labels Change Minds About Sharing MP3s · · Score: 1

    How can I tell whether my song is original

    It is fingerprinted and compared against a database of registered songs.
    "Any audio that you upload to the imeem service will be filtered by an audio fingerprint filtering system that prevents registered audio content from being full-length streamed to any users other than the user that uploaded it. "

    As far as any writers rights, fingerprinting only goes so far. An infringing song might not be registered in the fingerprint database and later lead to a legal challange.

  21. Re:The content is fingerprinted.. on Record Labels Change Minds About Sharing MP3s · · Score: 1

    The important parts you missed are:

    There is tons of jucy stuff in the TOS. I started with one point and then started rambeling as I kept finding stuff.. I just cut it off. Go ahead and post the rest of the TOS. It's a good read.

  22. Re:I didn't post a refrence.. on Why Xbox Live Doesn't Take Exact Change · · Score: 1

    Here is one place you can see Arco and others that take debit cards only and have a 45 cent transaction fee.

    http://home.fueltracker.com/home.html

    "Arco $3.05 $3.27 $0.00 Palomar at I-5 by North-bound ramp Debit cards only accepted with a 45 cent service charge. Cash is best"

    and near the bottom of the list is this gem;
    "El Cajon Blvd at 33rd Place (cash price)"

    The post doesn't say if they take debit cards only or if that implies another price other than the cash price for credit card purchases.

  23. Re:It Should Be An Option... on Why Xbox Live Doesn't Take Exact Change · · Score: 1

    That's also against the rules.. I guess some places just like being fined.

    Are debit cards immune from this? Where I have seen the fees posted are where they don't take credit cards, but do take debit cards and cash. Even though your debit card is a Visa, I think the fact it isn't a credit card is the reason they get away with it. It is a national brand. It's AM/PM along with Arco gas that has a nationwide as far as I can tell 45 cent transaction fee. It hurts them. I either buy with cash or buy elsewhere. I wonder if they make up for the lost business in fees?

    The one that got me was the rates they charge in California just to connect to a propane cylinder. I traveled to southern CA for a show and took an empty cylinder for safety in travel. They wanted something like $15 just to connect. I checked several places. The gas was extra. I took a 5 lb cylinder.. $15 bucks for the privilage of filling a 1 gallon tank. What a deal. I left the tank empty and bought a couple disposable cylinders for the project. I've never seen a place so obsessed with fees before except New York. Do Californians ever fill 5 lb tanks, or do they just stick with landfill tanks?

  24. Re:The content is fingerprinted.. on Record Labels Change Minds About Sharing MP3s · · Score: 5, Informative

    From the terms of service page...

    "Any audio that you upload to the imeem service will be filtered by an audio fingerprint filtering system that prevents registered audio content from being full-length streamed to any users other than the user that uploaded it. "

    This is why some tracks are fully playable without an account and other tracks are 30 seconds. They also frown on uploading content that you didn't create.

    "You must not upload or present any media or content in which you do not have the appropriate rights to do so. You may be in violation of copyright laws if you do not have the appropriate rights to the media or content you upload or present on imeem. imeem will not tolerate known infringements or misbehavior by its users."

    Most disturbing part of the terms of service is they claim you retain your copyright when you upload, but in uploading you provide an unrevokable license to them.. This is bad.

    "Member Content, you agree to and hereby do grant, and you represent and warrant that you have the right to grant, imeem, its contractors, and the users of the imeem Site an irrevocable, perpetual, non-exclusive, royalty-free, fully sublicensable, fully paid up, worldwide license to use, copy, publicly perform, digitally perform, publicly display, and distribute such content and to prepare derivative works of, or incorporate into other works, such Member Content on the imeem Site or Service."

    Basicaly you give them a permanant license to use your content in any way they want forever including distribution. They could compile your work and then sell it worldwide and you would get jack for royalties.

  25. Re:Making available on Record Labels Change Minds About Sharing MP3s · · Score: 5, Informative

    Is this going to stop the RIAA lawsuits at all? This reads like an advertisement for the social site more than that the record companies have done an about face in policy.


    Nothing changes in the P2P lawsuits. The RIAA has been solid on a copy of a copy of a copy of a copy being as good as the original copy is a bad bad thing. Making a copyable file and posting it is bad bad bad and we will sue...

    This website is not P2P. It is a post and broadcast.. There is no download and pass along a copy.. well not without some google searching on how to D/L a copy in violation of the DMCA. The songs are protected by streaming flash and maybe an identifying watermark.

    The site is now a web broadcaster. The site pays royalties out of the advertising revenue. There is no P2P. Copies stolen (copyright violated) may be identified for later lawsuits by watermarking or other identifiers provided at the site to prevent theft (copyright violations). This is probably why there is no listening beyond a 30 second clip without an account. With an account the info may be embeded in the clips so if they show up on Kazaa later, they know who to sue for the violation. How much personal information do you have to give to get an account? If it requires a CC number, you are pretty much a sitting duck if you D/L and post on Kazaa.