How The THX Noise Was Created 243
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."
Some tangential "Deep Note" trivia (Score:5, Interesting)
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"?
Blasting Speaker Noise (Score:5, Interesting)
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.
On Purpose? (Temporal Masking) (Score:4, Interesting)
THX, DTS, etc. (Score:3, Interesting)
Re:Blasting Speaker Noise (Score:3, Interesting)
Many Variations on a theme. (Score:5, Interesting)
TODO: log random number generator seed (Score:5, Interesting)
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.
Re:THX, DTS, etc. (Score:3, Interesting)
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.
MythBusters busts it (Score:3, Interesting)
MythBusters confirms it: Brown note is dying [wikipedia.org]
Re:Two words: Styx & Krakatoa (Score:2, Interesting)
Something cool to try... (Score:2, Interesting)
(Uh... not that I'd know what a nuclear reactor would sound like... yeah, uh, you can get back to dealing with Iran now...)
Re:Two words: Styx & Krakatoa (Score:3, Interesting)
Wasn't it called an "orchestral freak out [wikipedia.org]". 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.