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Music SoftSynth

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LICENSE.txt
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DO WHAT THE FUCK YOU WANT TO PUBLIC LICENSE
Version 2, December 2004
 
Copyright (C) 2011 Mathieu 'p01' Henri http://www.p01.org/releases/
 
Everyone is permitted to copy and distribute verbatim or modified
copies of this license document, and changing it is allowed as long
as the name is changed.
 
DO WHAT THE FUCK YOU WANT TO PUBLIC LICENSE
TERMS AND CONDITIONS FOR COPYING, DISTRIBUTION AND MODIFICATION
 
0. You just DO WHAT THE FUCK YOU WANT TO.
README.md
Markdown

Music SoftSynth

On September 26, 2011 Viznut released the Experimental music from very short C programs video on Youtube. Soon people started playing with various formulas and building tools to test them. The time has come for this project and 140byt.es to have a tiny baby.

Behold the 140bytes Music SoftSynth in JavaScript!

See more information and a live demo of the 140bytes Music SoftSynth

annotated.js
JavaScript
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function
(
f, // the formula generating the sound
 
// placeholder arguments
t, // tick
S // header+body of our WAVE PCM
)
{
for
(
var
t|=
// start with a butchered but working WAVE PCM header
S='RIFF_oO_WAVEfmt '+atob('EAAAAAEAAQBAHwAAQB8AAAEACAA')+'data'
;++t<3e5;
)
// eval and append the next 8bits value of the sound
S+=String.fromCharCode( eval(f) );
// and return the sound
return S
}
package.json
JSON
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{
"name": "musicSoftSynth",
 
"description": "Mathematic formula goes in, music come out.",
 
"keywords": [
"softsynth",
"audio",
"wave",
"formula",
"music"
]
}
test.html
HTML
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<!DOCTYPE html>
<title>140bytes softsynth</title>
<div>Expected result: <b>music playing, people dancing</b></div>
<script>
 
var softSynth = function(f,t,S){for(t=|S='RIFF_oO_WAVEfmt '+atob('EAAAAAEAAQBAHwAAQB8AAAEACAA')+'data';++t<3e5;)S+=String.fromCharCode(eval(f));return S}
 
// kudos to Matthew 'Gasman' Westcott for this catchy tune
var formula = "(t<<3)*[8/9,1,9/8,6/5,4/3,3/2,0][[0xd2d2c8,0xce4088,0xca32c8,0x8e4009][t>>14&3]>>(0x3dbe4688>>((t>>10&15)>9?18:t>>10&15)*3&7)*3&7]&255";
 
new Audio( 'data:audio/wav;base64,'+ btoa( softSynth( formula ) ) ).play();
 
</script>

I think this is one of the most wonderful 140bytes gists I've ever seen.
@p01 amazing work!

Save 3 bytes by the way.

function(f,t,S){for(t=0;++t<3e5;)S+=String.fromCharCode(eval(f));return'RIFF_oO_WAVEfmt '+atob('EAAAAAEAAQBAHwAAQB8AAAEACAA')+'data'+S}

Thanks

One thing I considered was getting rid of the 3e5 and pass an argument T instead. Same size but more flexible, at the cost of having to pass the "duration/number of blocks" all the time.

@tsaniel: That's basically offloading the empty string to the function call. Mmmmh, not sure that gives us much for the 'slow' version of Music SoftSynth, but it does bring the 'fast' version down to 139 bytes:

function(f,S,t){return'RIFF_oO_WAVEfmt "+atob('EAAAAAEAAQBAHwAAQB8AAAEACAA')+"data'+eval("for(t=0;++t<3e5;)S+=String.fromCharCode("+f+")")}

There couldn't have been a 140byt.es without some p01 magic... This is sick. Just sick....

\:D/ I managed to gain one byte while still only passing the formula

Another nice usage of |=, gook job @p01!

Somehow a typo made its way into test.html, fix here: https://gist.github.com/2875542

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