index.md

---

title: AudioContext.baseLatency
slug: Web/API/AudioContext/baseLatency
page-type: web-api-instance-property
browser-compat: api.AudioContext.baseLatency

---

{{APIRef("Web Audio API")}}

The baseLatency read-only property of the {{domxref("AudioContext")}} interface returns a double that represents the number of seconds of processing latency incurred by the AudioContext passing an audio buffer from the {{domxref("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 {{domxref("AudioContext.AudioContext()", "construction time", "", "true")}} with the latencyHint option, but the browser may ignore the option.

Value

A double representing the base latency in seconds.

Examples

// 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

{{Specifications}}

Browser compatibility

{{Compat}}

See also

• Using the Web Audio API

• Web Audio API