AudioContextOptions.latencyHint

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AudioContextOptions dictionary (used when instantiating an AudioContext ) may contain a property named latencyHint , which indicates the preferred maximum latency in seconds for the audio context. The value is specified either as a member of the string enum AudioContextLatencyCategory or a double-precision value.

句法

audioContextOptions.latencyHint = "interactive";
audioContextOptions.latencyHint = 0.2;
var latencyHint = audioContextOptions.latencyHint;

值

The preferred maximum latency for the AudioContext . There are two ways this value can be specified.

The best way to specify the preferred latency is to use a value form the string enum AudioContextLatencyCategory . In fact, the default value of latencyHint is "interactive" (meaning the browser should try to use the lowest possible and reliable latency it can).

The value can also be specified as a double-precision floating-point value, specifying the preferred maximum latency in seconds. This provides more precise control over the balance between audio latency and device energy usage.

To determine the actual latency of the context after creating it, check the value of the context's baseLatency 特性。

规范

规范	状态	注释
Web 音频 API The definition of 'AudioContextOptions.latencyHint' in that specification.	工作草案	初始定义。

浏览器兼容性

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. 更新 GitHub 上的兼容性数据

	桌面						移动
	Chrome	Edge	Firefox	Internet Explorer	Opera	Safari	Android webview	Chrome for Android	Firefox for Android	Opera for Android	Safari on iOS	Samsung Internet
`latencyHint`	Chrome 60	Edge ≤79	Firefox 61	IE No	Opera ?	Safari ?	WebView Android 60	Chrome Android 60	Firefox Android 61	Opera Android ?	Safari iOS ?	Samsung Internet Android 8.0

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AudioContext : The interface describing an audio context
AudioContext() : The audio context constructor, which accepts a AudioContextOptions object as an input.

元数据

最后修改： Mar 18, 2019

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