The sampleRate
property of the AudioBuffer
interface returns a float representing the sample rate, in samples per second, of the PCM data stored in the buffer.
Syntax
var myArrayBuffer = audioCtx.createBuffer(2, frameCount, audioCtx.sampleRate); myArrayBuffer.sampleRate;
Value
A float.
Example
// Stereo var channels = 2; // Create an empty two second stereo buffer at the // sample rate of the AudioContext var frameCount = audioCtx.sampleRate * 2.0; var myArrayBuffer = audioCtx.createBuffer(2, frameCount, audioCtx.sampleRate); button.onclick = function() { // Fill the buffer with white noise; // just random values between -1.0 and 1.0 for (var channel = 0; channel < channels; channel++) { // This gives us the actual ArrayBuffer that contains the data var nowBuffering = myArrayBuffer.getChannelData(channel); for (var i = 0; i < frameCount; i++) { // Math.random() is in [0; 1.0] // audio needs to be in [-1.0; 1.0] nowBuffering[i] = Math.random() * 2 - 1; } } console.log(myArrayBuffer.sampleRate); }
Specification
Specification | Status | Comment |
---|---|---|
Web Audio API The definition of 'sampleRate' in that specification. |
Working Draft |
Browser compatibility
Feature | Chrome | Firefox (Gecko) | Internet Explorer | Opera | Safari (WebKit) |
---|---|---|---|---|---|
Basic support | 14 webkit | 23 | Not supported | 15 webkit 22 (unprefixed) |
6 webkit |
Feature | Android | Chrome | Firefox Mobile (Gecko) | Firefox OS | IE Phone | Opera Mobile | Safari Mobile |
---|---|---|---|---|---|---|---|
Basic support | Not supported | 28 webkit | 25 | 1.2 | Not supported | Not supported | 6 webkit |
See also
Document Tags and Contributors
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Contributors to this page:
fscholz,
chrisdavidmills
Last updated by:
fscholz,