The delayTime
property of the DelayNode
interface is an a-rate AudioParam
representing the amount of delay to apply.
delayTime
is expressed in seconds, its minimal value is 0
, and its maximum value is defined by the maxDelayTime
argument of the AudioContext.createDelay()
method that created it.
Syntax
var audioCtx = new AudioContext(); var myDelay = audioCtx.createDelay(5.0); myDelay.delayTime.value = 3.0;
Note: Though the AudioParam
returned is read-only, the value it represents is not.
Value
An AudioParam
.
Example
We have created a simple example that allows you to play three different samples on a constant loop — see create-delay (you can also view the source code). If you just press the play buttons, the loops will start immediately; if you slide the sliders up to the right, then press the play buttons, a delay will be introduced, so the looping sounds don't start playing for a short amount of time.
var AudioContext = window.AudioContext || window.webkitAudioContext; var audioCtx = new AudioContext(); var synthDelay = audioCtx.createDelay(5.0); ... var synthSource; playSynth.onclick = function() { synthSource = audioCtx.createBufferSource(); synthSource.buffer = buffers[2]; synthSource.loop = true; synthSource.start(); synthSource.connect(synthDelay); synthDelay.connect(destination); this.setAttribute('disabled', 'disabled'); } stopSynth.onclick = function() { synthSource.disconnect(synthDelay); synthDelay.disconnect(destination); synthSource.stop(); playSynth.removeAttribute('disabled'); } ... var delay1; rangeSynth.oninput = function() { delay1 = rangeSynth.value; synthDelay.delayTime.setValueAtTime(delay1, audioCtx.currentTime); }
Specifications
Specification | Status | Comment |
---|---|---|
Web Audio API The definition of 'delayTime' in that specification. |
Working Draft |
Browser compatibility
Desktop | Mobile | |||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|
delayTime | Chrome Full support 14 | Edge Full support 12 | Firefox Full support 25 | IE No support No | Opera Full support 15 | Safari Full support 6 | WebView Android Full support Yes | Chrome Android Full support 18 | Firefox Android Full support 26 | Opera Android Full support 14 | Safari iOS Full support Yes | Samsung Internet Android Full support 1.0 |
Legend
- Full support
- Full support
- No support
- No support