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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."
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"?
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?!
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.
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?
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.
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.
MythBusters confirms it: Brown note is dying
please, both of you learn your history.. Iannis Xenakis in 1953
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.
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.