AudioContextLatencyCategory type is an enumerated set of strings which are used to select one of a number of default values for acceptable maximum latency of an audio context. By using these strings rather than a numeric value when specifying a latency to a AudioContext , you can allow the user agent to select an appropriate latency for your use case that makes sense on the device on which your content is being used.

AudioContextLatencyCategory can be used when constructing a new AudioContext by passing one of these values as the latencyHint option in the AudioContext() constructor's options dictionary.


"balanced" The user agent should balance audio output latency and power consumption when selecting a latency value.
"interactive" The audio is involved in interactive elements, such as responding to user actions or needing to coincide with visual cues such as a video or game action. The user agent should select the lowest possible latency that doesn't cause glitches in the audio. This is likely to require increased power consumption. This is the default value.
"playback" The user agent should select a latency that will maximize playback time by minimizing power consumption at the expense of latency. Useful for non-interactive playback, such as playing music.


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


Showing compatibility for latencyHint .

更新 GitHub 上的兼容性数据
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
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