$('.audio-player').mediaelementplayer({
    alwaysShowControls: true,
    features: ['playpause','progress','volume'],
    audioVolume: 'horizontal',
    audioWidth: 450,
    audioHeight: 70,
    iPadUseNativeControls: true,
    iPhoneUseNativeControls: true,
    AndroidUseNativeControls: true
});