4 ms·

Opus Databending Drumkit

106 points by blackle 3y ago

starkparker 3y ago
Some missing context: the instruments are generated by Opus codec glitches. https://cybre.space/@SuricrasiaOnline/106633181764596703 https://cybre.space/@SuricrasiaOnline/106633181764596703, https://lethargic.talkative.fish/@suricrasia/statuses/01H6NA9C52D3RGGKW22GC61S3S https://lethargic.talkative.fish/@suricrasia/statuses/01H6NA...
- catapart 3y ago
  Ahhh, thank you! I was wondering what the seed corresponded to. Pretty neat little thing! I was just trying to figure out if they were using some novel system to categorize procedural synths as "good", because that seems pretty useful! Still a neat little thing, though!
- Aachen 3y ago
  I still don't get it. What's an Opus codec glitch? I know roughly how things like jpg, flac, and mp3 work, and worked with Opus via ffmpeg/opusenc, but what makes some sounds a glitch? Can you only hear this when playing the data with certain decoders or so? The page and the posts don't say
  - justsomehnguy 3y ago
    My guess would be it's when you chose the codec parameters such the output gets some weird artefacts not present in the original source.
  - TazeTSchnitzel 3y ago
    This might be glitching in the sense of “glitch art”, where you deliberately corrupt a compressed file in small ways (flip a few bits here and there, for example) that propagate in interesting ways when decompressed.
  - MaPi_ 3y ago
    On the projects page (https://suricrasia.online/projects/ https://suricrasia.online/projects/) it says "Make glitchy beats with randomly generated Opus protocol packets." So I guess it's random data fed into the opus decoder.
    - blackle 3y ago
      author here: this is correct. the opus protocol is so efficient, you can fill a packet with random data and it will still decompress into a sensible sound. this is where all the sounds come from
      - postalrat 3y ago
        I've thought about doing something similar for google's voice compression lyra https://github.com/google/lyra https://github.com/google/lyra
      - Aachen 3y ago
        That... how is that a glitch? That's it functioning as designed
- jmvalin 3y ago
  (Opus author here) I'm curious what kind of "glitch" this is referring to.
  - blackle 3y ago
    author here: they are randomly generated packets, extended using the packet loss concealment feature. you can fill a packet with random data and it will still decompress into a sensible sound, and that's where all the sounds in the drum machine come from
cma5 3y ago
Lot's of fun. Try this :) [["56ne","count","plenk","aaa","reck"],2,138,[[194,256,0],[140,4112,0],[281,64,5],[298,257,0],[397,4096,7],[396,8193,14],[393,1088,3]],[[-1,36,0],[476,-18,17],[476,-54,78]]]
- tomcam 3y ago
  Sounds excellent. Thanks! Even the default pattern they use on start up is pretty sick.
pimlottc 3y ago
Doesn’t make any sound on mobile Safari. Layout is pretty good though.
- grav 3y ago
  Works for me. You probably need to unmute the phone.
  - pimlottc 3y ago
    Oh, that would be a good idea.. oops!
JaggedNZ 3y ago
[["blah","seed"],11,125,[[187,257,0,1],[25,4176,0],[42,0,5],[50,16512,5],[75,5189,3],[76,16656,7],[87,257,10],[88,257,0],[87,4112,13],[11,272,2],[11,1024,6]],[[-1,0,0],[39,-64,19]]]
deleted 3y ago
[deleted]
BriggyDwiggs42 3y ago
Fire ["Jpeg",75,125,[[42,8224,0],[43,8,0],[50,8192,10],[55,4010,7],[55,43690,8],[56,32768,11],[68,8224,8],[68,552,7],[73,8,9],[68,8224,8],[68,544,7]],[[-1,100,2]]]

106 points by blackle 3y ago

Some missing context: the instruments are generated by Opus codec glitches. https://cybre.space/@SuricrasiaOnline/106633181764596703 https://cybre.space/@SuricrasiaOnline/106633181764596703, https://lethargic.talkative.fish/@suricrasia/statuses/01H6NA9C52D3RGGKW22GC61S3S https://lethargic.talkative.fish/@suricrasia/statuses/01H6NA...

catapart 3y ago
Ahhh, thank you! I was wondering what the seed corresponded to. Pretty neat little thing! I was just trying to figure out if they were using some novel system to categorize procedural synths as "good", because that seems pretty useful! Still a neat little thing, though!
Aachen 3y ago
I still don't get it. What's an Opus codec glitch? I know roughly how things like jpg, flac, and mp3 work, and worked with Opus via ffmpeg/opusenc, but what makes some sounds a glitch? Can you only hear this when playing the data with certain decoders or so? The page and the posts don't say
- justsomehnguy 3y ago
  My guess would be it's when you chose the codec parameters such the output gets some weird artefacts not present in the original source.
- TazeTSchnitzel 3y ago
  This might be glitching in the sense of “glitch art”, where you deliberately corrupt a compressed file in small ways (flip a few bits here and there, for example) that propagate in interesting ways when decompressed.
- MaPi_ 3y ago
  On the projects page (https://suricrasia.online/projects/ https://suricrasia.online/projects/) it says "Make glitchy beats with randomly generated Opus protocol packets." So I guess it's random data fed into the opus decoder.
  - blackle 3y ago
    author here: this is correct. the opus protocol is so efficient, you can fill a packet with random data and it will still decompress into a sensible sound. this is where all the sounds come from
    - postalrat 3y ago
      I've thought about doing something similar for google's voice compression lyra https://github.com/google/lyra https://github.com/google/lyra
    - Aachen 3y ago
      That... how is that a glitch? That's it functioning as designed
jmvalin 3y ago
(Opus author here) I'm curious what kind of "glitch" this is referring to.
- blackle 3y ago
  author here: they are randomly generated packets, extended using the packet loss concealment feature. you can fill a packet with random data and it will still decompress into a sensible sound, and that's where all the sounds in the drum machine come from

cma5 3y ago

Lot's of fun. Try this :) [["56ne","count","plenk","aaa","reck"],2,138,[[194,256,0],[140,4112,0],[281,64,5],[298,257,0],[397,4096,7],[396,8193,14],[393,1088,3]],[[-1,36,0],[476,-18,17],[476,-54,78]]]

tomcam 3y ago
Sounds excellent. Thanks! Even the default pattern they use on start up is pretty sick.

pimlottc 3y ago

Doesn’t make any sound on mobile Safari. Layout is pretty good though.

grav 3y ago
Works for me. You probably need to unmute the phone.
- pimlottc 3y ago
  Oh, that would be a good idea.. oops!

JaggedNZ 3y ago

[["blah","seed"],11,125,[[187,257,0,1],[25,4176,0],[42,0,5],[50,16512,5],[75,5189,3],[76,16656,7],[87,257,10],[88,257,0],[87,4112,13],[11,272,2],[11,1024,6]],[[-1,0,0],[39,-64,19]]]

deleted 3y ago

[deleted]

BriggyDwiggs42 3y ago

Fire ["Jpeg",75,125,[[42,8224,0],[43,8,0],[50,8192,10],[55,4010,7],[55,43690,8],[56,32768,11],[68,8224,8],[68,552,7],[73,8,9],[68,8224,8],[68,544,7]],[[-1,100,2]]]