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Last change
on this file since 28388 was 28388, checked in by davidb, 11 years ago |
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Set of JS, CSS, PNG etc web resources to support a mixture of audio player/document display capabilities
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File size:
1.1 KB
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| 1 | <!DOCTYPE html>
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| 2 | <html>
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| 3 | <head>
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| 4 | <script src="pcmdata.js"></script>
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| 5 | <script src="../sink.js"></script>
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| 6 | <script>
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| 7 | (function(){
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| 8 |
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| 9 | var sampleRate, phase = 0, lfo = 0, lfo2 = 0, sink;
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| 10 |
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| 11 | window.onload = function () {
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| 12 | sink = new Sink.sinks.wav();
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| 13 |
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| 14 | if (!sink.type === 'wav') return console.error('Not an instance of the WAV sink.');
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| 15 |
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| 16 | sink.on('audioprocess', function (buffer, channelCount) {
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| 17 | var i, n;
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| 18 | for (i=0; i<buffer.length; i+=channelCount) {
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| 19 | phase = (phase + 440 / sampleRate / 2) % 1;
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| 20 | for (n=0; n<channelCount; n++) {
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| 21 | buffer[i+n] += Math.sin(phase * Math.PI * 2) * 0.5;
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| 22 | }
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| 23 | }
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| 24 | });
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| 25 |
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| 26 | sink.on('audioprocess', function (buffer, channelCount) {
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| 27 | var i, n;
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| 28 | for (i=0; i<buffer.length; i+=channelCount) {
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| 29 | lfo2 = (lfo2 + 0.1 / sampleRate / 2) % 1;
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| 30 | lfo = (lfo + (Math.sin(lfo2 * Math.PI * 2) + 2) * 111 / sampleRate / 2) % 1;
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| 31 | for (n=0; n<channelCount; n++) {
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| 32 | buffer[i+n] *= Math.sin(lfo * Math.PI * 2);
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| 33 | }
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| 34 | }
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| 35 | });
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| 36 |
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| 37 | sampleRate = Sink.singleton().sampleRate;
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| 38 |
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| 39 | sink.on('error', function(e){
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| 40 | console.error(e);
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| 41 | });
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| 42 | };
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| 43 |
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| 44 | }());
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| 45 |
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| 46 | </script>
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| 47 | </head>
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| 48 | <body>
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| 49 | </body>
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| 50 | </html>
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