Opus Databending Drumkit (opens in new tab)

(suricrasia.online)

106 pointsblackle2y ago18 comments

18 comments

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

Aachen2y 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

MaPi_2y ago

On the projects page (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.

1 more reply

justsomehnguy2y 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.

TazeTSchnitzel2y 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.

catapart2y 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!

jmvalin2y ago

(Opus author here) I'm curious what kind of "glitch" this is referring to.

blackleOP2y 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

cma52y 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]]]

tomcam2y ago

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

JaggedNZ2y 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]]]

BriggyDwiggs422y 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]]]

pimlottc2y ago

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

grav2y ago

Works for me. You probably need to unmute the phone.

pimlottc2y ago

Oh, that would be a good idea.. oops!

j / k navigate · click thread line to collapse

18 comments

starkparker2y ago

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

Aachen2y ago

MaPi_2y ago

On the projects page (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.

1 more reply

justsomehnguy2y 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.

TazeTSchnitzel2y ago

catapart2y ago

Ahhh, thank you! I was wondering what the seed corresponded to.

jmvalin2y ago

(Opus author here) I'm curious what kind of "glitch" this is referring to.

blackleOP2y ago

cma52y 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]]]

tomcam2y ago

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

JaggedNZ2y 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]]]

BriggyDwiggs422y 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]]]

pimlottc2y ago

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

grav2y ago

Works for me. You probably need to unmute the phone.

pimlottc2y ago

Oh, that would be a good idea.. oops!

j / k navigate · click thread line to collapse