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 floating-point value indicating the current smaple rate of the buffer's data, in samples per second.
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 |