The createDelay()
method of the BaseAudioContext
Interface is used to create a DelayNode
, which is used to delay the incoming audio signal by a certain amount of time.
Syntax
var delayNode = audioCtx.createDelay(maxDelayTime);
Parameters
maxDelayTime
Optional- The maximum amount of time, in seconds, that the audio signal can be delayed by. Must be less than 180 seconds, and defaults to 1 second if not specified.
Returns
A DelayNode
. The default DelayNode.delayTime
is 0 seconds.
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 APIThe definition of 'createDelay()' in that specification. | Working Draft |
Browser compatibility
The compatibility table on this page is generated from structured data. If you'd like to contribute to the data, please check out https://github.com/mdn/browser-compat-data and send us a pull request.
Update compatibility data on GitHub
Desktop | Mobile | |||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|
createDelay
|
Chrome Full support 10 Full support 10 Prefixed' Implemented with the vendor prefix: webkit |
Edge
Full support ≤18 |
Firefox Full support 53 Full support 53 Notes' Originally implemented on |
IE
No support No |
Opera Full support 22 Full support 22 Full support 15 Prefixed' Implemented with the vendor prefix: webkit |
Safari Full support 6 Full support 6 Prefixed' Implemented with the vendor prefix: webkit |
WebView Android
Full support Yes |
Chrome Android
Full support 33 |
Firefox Android Full support 53 Full support 53 Notes' Originally implemented on |
Opera Android Full support 22 Full support 22 Full support 14 Prefixed' Implemented with the vendor prefix: webkit |
Safari iOS Full support 6 Full support 6 Prefixed' Implemented with the vendor prefix: webkit |
Samsung Internet Android
Full support 2.0 |
Legend
- Full support
- Full support
- No support
- No support
- See implementation notes.'
- See implementation notes.
- Requires a vendor prefix or different name for use.'
- Requires a vendor prefix or different name for use.
See also
BaseAudioContext.createDelay() by Mozilla Contributors is licensed under CC-BY-SA 2.5.