AudioBufferSourceNode.detune

The detune property of the AudioBufferSourceNode interface is a k-rate AudioParam representing detuning of oscillation in cents.

For example, values of +100 and -100 detune the source up or down by one semitone, while +1200 and -1200 detune it up or down by one octave.

Syntax

var source = audioCtx.createBufferSource();
source.detune.value = 100; // value in cents

Note: Though the AudioParam returned is read-only, the value it represents is not.

Value

A k-rate AudioParam whose value indicates the detuning of oscillation in cents.

Example

const audioCtx = new AudioContext();

const channelCount = 2;
const frameCount = audioCtx.sampleRate * 2.0; // 2 seconds

const myArrayBuffer = audioCtx.createBuffer(channelCount, frameCount, audioCtx.sampleRate);

for (let channel = 0; channel < channelCount; channel++) {
  const nowBuffering = myArrayBuffer.getChannelData(channel);
  for (let i = 0; i < frameCount; i++) {
    nowBuffering[i] = Math.random() * 2 - 1;
  }
}

const source = audioCtx.createBufferSource();
source.buffer = myArrayBuffer;
source.connect(audioCtx.destination);
source.detune.value = 100; // value in cents
source.start();

Specifications

Browser compatibility

Desktop Mobile
Chrome Edge Firefox Internet Explorer Opera Safari WebView Android Chrome Android Firefox for Android Opera Android Safari on IOS Samsung Internet
detune
44
13
40
No
31
14.1
44
44
40
32
14.5
4.0

See also

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Licensed under the Creative Commons Attribution-ShareAlike License v2.5 or later.
https://developer.mozilla.org/en-US/docs/Web/API/AudioBufferSourceNode/detune