context = new (window.AudioContext || window.webkitAudioContext)();
// shim layer with setTimeout fallback
window.requestAnimFrame = (function(){
    return  window.requestAnimationFrame      ||
        window.webkitRequestAnimationFrame ||
        window.mozRequestAnimationFrame    ||
        window.oRequestAnimationFrame      ||
        window.msRequestAnimationFrame     ||
        function( callback ){
            window.setTimeout(callback, 1000 / 60);
        };
})();


var sample = new AudioTagSample({orientation:'horizontal',axisScale:'lin'});
var links = document.querySelectorAll('.audio');
for (i=0;i<links.length;i++){
    links[i].addEventListener("click", function(ev) {
	ev.preventDefault();
        context.resume();
	sample.click(ev.target);
    });
}

function play_pause(el) {
    if (sample.audio.paused) {
        sample.click(sample.link);
    } else {
        sample.click(sample.link);
    }
}