var wavesurfer = Object.create(WaveSurfer);

wavesurfer.init({
    container: '#waveform',
    height: 60,
    waveColor: '#ADADAD',
    progressColor: '#29FE31',
    cursorColor: '#FFFFFF',
    normalize: true,
    reflection: true,
    barWidth: 3
});

wavesurfer.load('../media/demo.wav');

wavesurfer.on('ready', function () { wavesurfer.play(); });