extra-audio

Install

npm install --save extra-audio
# or
yarn add extra-audio

API

getAllChannelData

function getAllChannelData(buffer: AudioBuffer): Float32Array[]

Get all channels at once, because repeatedly executing AudioBuffer#getChannelData is expensive.

encodeWAV

function encodeWAV(audioBuffer: AudioBuffer): ArrayBuffer

Encode AudioBuffer to WAV with PCM 32-bit float little endian.

getFloatFrequencyData

function getFloatFrequencyData(input: Float32Array, output?: Float32Array): Float32Array

For optimization purposes, an output array can be passed in. This function has a requirement for the size of the output, which must be half the smallest power of 2 that greater than or equal to the size of input.

timeStretch

function timeStretch(input: Float32Array, output: Float32Array): Float32Array

granularTimeStretch

function granularTimeStretch(
  input: Float32Array
, output: Float32Array
, grainSize?: number
, window?: WindowFunction
, overlapRatio?: number
): Float32Array

granularPitchShift

function granularPitchShift(
  input: Float32Array
, output: Float32Array
, pitchScale: number
, inputGrainSize?: number
, window?: WindowFunction
, overlapRatio?: number
): Float32Array