audio-buffer-list

audio-buffer-list

Extension of BufferList for AudioBuffers. Handy and performant to deal with sequence of audio buffers − accumulate, read, stream, modify, delete etc. It provides interfaces both of AudioBuffer and BufferList, as well as bunch of other useful methods.

Usage

const AudioBufferList = require('audio-buffer-list')
const AudioBuffer = require('audio-buffer')

let abl = new AudioBufferList(new AudioBuffer(1, [0, .1, .2, .3]), new AudioBuffer(1, 100))

abl.append(new AudioBuffer(1, 100))

abl.length // 204
abl.slice() // <AudioBuffer 0, .1, .2, .3, 0...>

API

new AudioBufferList(source, options?)

source can be AudioBuffer, AudioBuffer array, AudioBufferList, AudioBufferList array or callback.

options may provide numberOfChannels, context for web audio API context and sampleRate.

new is not strictly required.

list.getChannelData(channel)

Return FloatArray with merged data for the channel.

list.copyFromChannel(destination, channel, startInChannel=0)

Put data from the channel to destination FloatArray. Optional startInChannel defines offset in the channel to start from.

list.copyToChannel(source, channel, startInChannel=0)

Put data from the source FloatArray into channel, optionally starting at startInChannel offset.

list.repeat(count)

Repeats contents of the list specified number of times. Modifies list in-place.

See also

• audio — high-level class for audio
• audio-buffer — audio buffer class for nodejs and browser
• audio-buffer-utils — toolset for audio buffers
• buffer-list — canonical BufferList implementation