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usefulthink/minimal-webaudio.js

Created March 11, 2013 21:30
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simplistic demo for using the audioContext of the webaudio-api
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minimal-webaudio.js
var audioContext = new webkitAudioContext(),
osc1 = audioContext.createOscillator(),
osc2 = audioContext.createOscillator();
osc1.frequency.value = 440; // Hz
osc2.frequency.value = 220; // one octave down
osc1.connect(audioContext.destination);
osc2.connect(audioContext.destination);
osc1.noteOn(0); // zeit in sek. nach start der internen clock des AudioContext (currentTime)
osc1.noteOff(1);
osc2.noteOn(.5);
osc2.noteOff(2);
// noch ein Beispiel für programmierte Verläufe von AudioParams
osc2.frequency.setValueAtTime(220, 1);
osc2.frequency.exponentialRampToValueAtTime(440, 2)
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