Recorder.js

A plugin for recording/exporting the output of Web Audio API nodes

Dependencies

This plugin requires Jussi Kalliokoski's terrific PCMData.js library, which you can find in original or minified form here.

Syntax

Constructor

var rec = new Recorder(source [, bufferLen])

Creates a recorder instance.

• source - The node whose output you wish to capture
• bufferLen - (optional) The length of the buffer that the internal JavaScriptNode uses to capture the audio. Can be tweaked if experiencing performance issues. Defaults to 4096.

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Methods

rec.record()
rec.stop()

Pretty self-explanatory... record will begin capturing audio and stop will cease capturing audio. Subsequent calls to record will add to the current recording.

rec.clear()

This will clear the recording.

rec.exportWAV([callback])

This will generate a data URI containing the recording in WAV format. The callback will be called with the data URI as its sole argument. If a callback is not specified, the default callback (as defined via configure) will be used. If no default has been set, an error will be thrown.

rec.configure(config)

This will set the configuration for Recorder. As of now, the only parameter is callback, which may be used to set a default callback for exportWAV.