wavesurfer.js + Minimap

var wavesurfer = WaveSurfer.create({
    // your options here
    plugins: [
        WaveSurfer.minimap.create({
            container: '#wave-minimap',
            waveColor: '#777',
            progressColor: '#222',
            height: 50
        })
    ]
});

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