AudioBuffer: sampleRate property

Baseline Widely available

This feature is well established and works across many devices and browser versions. It’s been available across browsers since ⁨July 2015⁩.

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.

Value

A floating-point value indicating the current sample rate of the buffers data, in samples per second.

Examples

// Stereo const channels = 2;  // Create an empty two second stereo buffer at the // sample rate of the AudioContext const frameCount = audioCtx.sampleRate * 2.0; const myArrayBuffer = audioCtx.createBuffer(2, frameCount, audioCtx.sampleRate);  button.onclick = () => {   // Fill the buffer with white noise;   // just random values between -1.0 and 1.0   for (let channel = 0; channel < channels; channel++) {     // This gives us the actual ArrayBuffer that contains the data     const nowBuffering = myArrayBuffer.getChannelData(channel);     for (let 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); };