Web/API/AudioContext/baseLatency

The baseLatency read-only property of the AudioContext interface returns a double that represents the number of seconds of processing latency incurred by the AudioContext passing an audio buffer from the AudioDestinationNode — i.e. the end of the audio graph — into the host system's audio subsystem ready for playing.

Note: You can request a certain latency during construction time with the latencyHint option, but the browser may ignore the option.

Syntax

var baseLatency = audioCtx.baseLatency;

Value

A double representing the base latency in seconds.

Example

// default latency ("interactive")
const audioCtx1 = new AudioContext();
console.log(audioCtx1.baseLatency); // 0.00

// higher latency ("playback")
const audioCtx2 = new AudioContext({ latencyHint: 'playback' });
console.log(audioCtx2.baseLatency); // 0.15

Specifications

Specification	Status	Comment
Web Audio APIThe definition of 'baseLatency' in that specification.	Working Draft	Initial definition.

Browser Compatibility

Update compatibility data on GitHub

	Desktop						Mobile
	Chrome	Edge	Firefox	Internet Explorer	Opera	Safari	Android webview	Chrome for Android	Firefox for Android	Opera for Android	Safari on iOS	Samsung Internet
`baseLatency` Experimental'	Chrome Full support 58	Edge Full support 79	Firefox Full support 70	IE No support No	Opera Full support 45	Safari No support No	WebView Android Full support 58	Chrome Android Full support 58	Firefox Android No support No	Opera Android Full support 43	Safari iOS No support No	Samsung Internet Android Full support 7.0

Legend

Full support: Full support
No support: No support
Experimental. Expect behavior to change in the future.': Experimental. Expect behavior to change in the future.