WebChucK

WebChucK brings the strongly-timed audio programming language, ChucK, to your web browser.

What is WebChucK?

WebChucK wraps a web-assembly compiled version of ChucK's virtual machine in a javascript API that enables communication between the browser UI and underlying ChucK shreds.

Compatible Browsers

Demo

Here is a simple ChucK program that plays a sine wave for 1 second at 220Hz. Click "Start" to run the ChucK code as a shred. If you don't hear anything, check out our troubleshooting guide.

// Sine oscillator at 220Hz
SinOsc osc => dac;
220 => osc.freq;
1::week => now;
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Feel free to edit the code and click "Replace" to replace the shred. Click "Stop" to remove the shred. Fun!

Let's do something more complicated.

// Pseudo 808 kick synthesis
SinOsc osc => ADSR oscEnv => Gain output; 
Noise noise => BPF noiseFilter => ADSR noiseEnv => output;
Envelope freqEnv => blackhole;
400 => noiseFilter.freq;
15 => noiseFilter.Q;
oscEnv.set(1::ms, 400::ms, 0.0, 0::ms);
noiseEnv.set(1::ms, 50::ms, 0.0, 0::ms);
output => dac;
// Play kick
150 => float startFreq;
1::ms => dur riseTime;
55 => float endFreq;
100::ms => dur dropTime;
function void kick() {
    oscEnv.keyOn();
    noiseEnv.keyOn();
    
    Math.random2(350, 450) => noiseFilter.freq;
    Math.random2(10, 15) => noiseFilter.Q;
    
    startFreq => freqEnv.target;
    riseTime => freqEnv.duration;
    riseTime => now;
    
    endFreq => freqEnv.target;
    dropTime => freqEnv.duration;
    dropTime => now;
}
// Background shred to frequency modulate kick osc
function void processEnvelopes() {
    while (true) {
        freqEnv.value() => osc.freq;
        1::samp => now;
    }
}
spork ~ processEnvelopes();
130 => int bpm;
60.0 / bpm => float step;
while (true) {
    spork ~ kick();
    step::second => now;
 
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Tutorials