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audio-context

v1.0.3

Published

A WebAudio Context singleton

Downloads

17,664

Readme

audio-context Build Status unstable Greenkeeper badge npm license

Creates a WebAudio context singleton with the given options. Returns null if not supported.

Example

var audioCtx = require('audio-context')()

You can also create an OfflineAudioContext in case you would like to process (faster) without any rendering.

var offlineContext = require('audio-context')({offline: true})

Usage

npm install audio-context

ctx = createContext(options|sampleRate)

Returns a singleton audio context for the given sampleRate.

The options:

  • sampleRate - if specified, will set the context sampleRate.
  • latencyHint - if specified, will control latency. One of 'balanced', 'playback', 'interaction' (default) or number.
  • offline - if specified, will create OfflineAudioContext.
  • length - if specified, will set number of frames for offline context.
  • channels - if specified, will set number of channels for offline context.
  • {...contextAttributes} any other options for the context.

Handles vendor prefixing for audio contexts. Returns null if we are not in a browser, or if the context is not available, or if there was an error creating the context.

Running tests

# Run tests in tape-run's default browser
npm test

# Run in a specified browser.
# See https://github.com/juliangruber/tape-run#runopts for options
npm test -- --browser firefox

License

MIT