1. 面向开发者的 Web 技术
  2. Web API
  3. AudioParam
  4. defaultValue

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AudioParam：defaultValue 属性

Baseline Widely available

This feature is well established and works across many devices and browser versions. It’s been available across browsers since 2015年7月.

AudioParam 接口的只读属性 defaultValue 表示创建该 AudioParam 的特定 AudioNode 所定义属性的初始值。

值

浮点数 Number。

示例

js
const audioCtx = new AudioContext();
const gainNode = audioCtx.createGain();
const defaultVal = gainNode.gain.defaultValue;
console.log(defaultVal); // 1
console.log(defaultVal === gainNode.gain.value); // true

规范

Specification
Web Audio API
# dom-audioparam-defaultvalue

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参见

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