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.
A double representing the base latency in seconds.
js
// 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
| Specification |
|---|
| Web Audio API # dom-audiocontext-baselatency |
| Desktop | Mobile | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Chrome | Edge | Firefox | Internet Explorer | Opera | Safari | WebView Android | Chrome Android | Firefox for Android | Opera Android | Safari on IOS | Samsung Internet | |
baseLatency |
58 | 79 | 70 | No | 45 | 14.1 | 58 | 58 | 79 | 43 | 14.5 | 7.0 |
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https://developer.mozilla.org/en-US/docs/Web/API/AudioContext/baseLatency