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srikumarks/multi-channel-sinewave-test.html

Created May 7, 2013 04:49
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Fixed multi-channel sine wave test of Web Audio API glitching.
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multi-channel-sinewave-test.html
<!DOCTYPE HTML>
<body>
<script>
var N = 1;
try {
var ctx = new AudioContext();
} catch (e) {
ctx = new webkitAudioContext();
}
var ctr = [0,0];
for (var i = 0; i < N; ++i) {
var sp = ctx.createScriptProcessor(1024*4);
sp.connect(ctx.destination);
sp.onaudioprocess = function(e) {
for (var i = 0; i < e.outputBuffer.numberOfChannels; ++i) {
var ctr_channel = ctr[i];
for (var j = 0; j < e.outputBuffer.getChannelData(i).length; ++j) {
e.outputBuffer.getChannelData(i)[j] = Math.sin((ctr_channel++/ctx.sampleRate)*Math.PI*2*3000);
}
ctr[i] = ctr_channel;
}
};
}
</script>
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