AudioBufferSourceNode: buffer property
The buffer
property of the AudioBufferSourceNode
interface provides the ability to play back audio
using an AudioBuffer
as the source of the sound data.
If the buffer
property is set to the value null
, the node
generates a single channel containing silence (that is, every sample is 0).
Value
An AudioBuffer
which contains the data representing the sound which the
node will play.
Examples
Note: For a full working example, see this code running live, or view the source.
js
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;
}
}
// Get an AudioBufferSourceNode.
// This is the AudioNode to use when we want to play an AudioBuffer
const source = audioCtx.createBufferSource();
// set the buffer in the AudioBufferSourceNode
source.buffer = myArrayBuffer;
};
Specifications
Specification |
---|
Web Audio API # dom-audiobuffersourcenode-buffer |
Browser compatibility
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