# wavesurfer.js + Microphone

#### wavesurfer.js Microphone Plugin

Visualizes audio input from a microphone in wavesurfer.js instances.

#### Installation

1. add the Microphone plugin to the plugins property of the wavesurfer options
2. create a new instance of wavesurfer by using the create function
3. control the Microphone using the `start`, `stopDevice`, `play`, `pause`, `stop` and `togglePlay` methods

Download the plugin

#### Quick Start

    var wavesurfer = WaveSurfer.create({
      container     : '#waveform',
      waveColor     : 'black',
      interact      : false,
      cursorWidth   : 0,
      plugins: [
        WaveSurfer.microphone.create()
      ]
    });

    wavesurfer.microphone.on('deviceReady', function(stream) {
        console.log('Device ready!', stream);
    });
    wavesurfer.microphone.on('deviceError', function(code) {
        console.warn('Device error: ' + code);
    });

    // start the microphone
    wavesurfer.microphone.start();

    // pause rendering
    //wavesurfer.microphone.pause();

    // resume rendering
    //wavesurfer.microphone.play();

    // stop visualization and disconnect microphone
    //wavesurfer.microphone.stopDevice();

    // same as stopDevice() but also clears the wavesurfer canvas
    //wavesurfer.microphone.stop();

    // destroy the plugin
    //wavesurfer.microphone.destroy();

#### Options

Name | Required | Default | Description
--- | --- | --- | ---
`wavesurfer` | yes |  | A WaveSurfer instance.
`bufferSize` | no | 4096 | The buffer size in units of sample-frames. If specified, the `bufferSize` must be one of the following values: 256, 512, 1024, 2048, 4096, 8192, 16384.
`numberOfInputChannels` | no | 1 | Integer specifying the number of channels for this node's input. Values of up to 32 are supported.
`numberOfOutputChannels` | no | 1 | Integer specifying the number of channels for this node's output. Values of up to 32 are supported.

#### Events

Name | Description
--- | ---
`deviceReady` | Invoked when the device is ready to use. Callback will receive a `LocalMediaStream` object that contains the microphone stream.
`deviceError` | Invoked when the user doesn't allow the browser to access the microphone. Callback will receive a (string) error code.

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