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THX Deepnote and the Audio Signal Processor

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  THX Deepnote and the Audio Signal Processor RS Wood  <rsw@therandymon.com> - 2014-04-08 23:29 +0000

#2317 — THX Deepnote and the Audio Signal Processor

From the «sounds like buttered popcorn» department:
Title: Recreating the THX Deep Note
Author: Adam Fabio
Date: Mon, 07 Apr 2014 19:01:02 -0400
Link: http://feedproxy.google.com/~r/hackaday/LgoM/~3/mHotov9_fKg/
Podcast Download URL: http://hackadaycom.files.wordpress.com/2014/04/wallpaper_thx_1280_01.jpg?w=562

[image 1]

Few sounds are as recognizable as the THX Deep Note. [Batuhan] did some
research, and set about recreating the sound[2]. The original Deep Note[3]
 (mp3 link) was created in 1982 by [Dr. James A. Moorer]. [Dr. Moorer] used
the Audio Signal Processor (ASP) (AKA SoundDroid[4]) to create the sound. The
ASP was a complex machine to program. The Deep Note took about 20,000 lines
of C code to program. The C code was compiled to about 250,000 discrete
statements to command the ASP.

Only one ASP was ever built, and LucasFilm owned it. Instead of recreating
the hardware, [Batuhan] used SuperCollider[5] to recreate the sound. Just
like the ASP, SuperCollider is a tool for real-time audio synthesis. The
difference is that SuperCollider is open source and runs on modern computers.
[Batuhan] used his research and ears to perform an analysis of the Deep Note.
He created two re-creations. The first is carefully constructed to replicate
the sound. The second is a Twitter worthy 140 character version. Both
versions are reasonable facsimiles of the original Deep Note, though they’re
not quite perfect to our ears.

[Batuhan] isn’t the only person working on recreations. Deep Note in 1KB of
JavaScript can be heard at  http://thx.onekb.net[6]/. We’d love to hear other
versions created by Hackaday readers!

[Via Reddit[7]]

Filed under: musical hacks[8][image 9][image 10][image 11]

Links:
[1]: http://hackadaycom.files.wordpress.com/2014/04/wallpaper_thx_1280_01.jpg?w=562&h=450 (image)
[2]: http://www.earslap.com/instruction/recreating-the-thx-deep-note (link)
[3]: http://www.uspto.gov/trademarks/soundmarks/74309951.mp3 (link)
[4]: http://en.wikipedia.org/wiki/SoundDroid (link)
[5]: http://supercollider.sourceforge.net/ (link)
[6]: http://thx.onekb.net/ (link)
[7]: http://www.reddit.com/r/programming/comments/228fmo/recreating_the_thx_deep_note/ (link)
[8]: http://feeds.wordpress.com/1.0/gocomments/hackadaycom.wordpress.com/119110/ (link)
[9]: http://feeds.wordpress.com/1.0/comments/hackadaycom.wordpress.com/119110/ (image)
[10]: http://stats.wordpress.com/b.gif?host=hackaday.com&blog=4779443&post=119110&subd=hackadaycom&ref=&feed=1 (image)
[11]: http://feeds.feedburner.com/~r/hackaday/LgoM/~4/mHotov9_fKg (image)

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