GainNode.gain
Baseline Widely available
This feature is well established and works across many devices and browser versions. It’s been available across browsers since April 2021.
GainNode 介面的 gain 屬性是 a-rate AudioParam，代表增益的數值。
語法
js
var audioCtx = new AudioContext();
var gainNode = audioCtx.createGain();
gainNode.gain.value = 0.5;
傳回值
一個 AudioParam.
備註：雖然傳回的 AudioParam 是唯讀的，但是它所代表的值可以更改。
範例
See BaseAudioContext.createGain() for example code showing how to use an AudioContext to create a GainNode, which is then used to mute and unmute the audio by changing the gain property value.
規格
| Specification |
|---|
| Web Audio API # dom-gainnode-gain |
瀏覽器相容度
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