AudioBuffer.copyFromChannel()

Baseline Widely available

This feature is well established and works across many devices and browser versions. It’s been available across browsers since ⁨2021年4月⁩.

AudioBuffer接口的 copyFromChannel 方法将样本从 AudioBuffer 的指定通道复制到目标数组中

语法

myArrayBuffer.copyFromChannel(destination,channelNumber,startInChannel);

参数

destination: 将通道数据复制到的Float32Array
channelNumber: 当前 AudioBuffer 的通道号，用于复制通道数据。键入 channelNumber 大于或等于AudioBuffer.numberOfChannels，将会抛出INDEX_SIZE_ERR 的错误
startInChannel 可选: 用于复制数据的可选偏移量。假如startInChannel 比AudioBuffer.length大，将会抛出INDEX_SIZE_ERR 的错误

例子

var myArrayBuffer = audioCtx.createBuffer(2, frameCount, audioCtx.sampleRate);
var anotherArray = new Float32Array();
myArrayBuffer.copyFromChannel(anotherArray, 1, 0);