HTML5 <audio> playback with fade in and fade out

Question

I\'d like to start and stop HTML5 playback in a random position with fade in and fade out periods to smooth the listening experience.

What kind of mechanisms exists

Answer 1

Here are a couple of functions to fade-out current song and fade-in new song.

HTML:

Javascript:

    function audioVolumeIn(q){
       if(q.volume){
          var InT = 0;
          var setVolume = 0.2; // Target volume level for new song
          var speed = 0.005; // Rate of increase
          q.volume = InT;
          var eAudio = setInterval(function(){
              InT += speed;
              q.volume = InT.toFixed(1);
              if(InT.toFixed(1) >= setVolume){
                 clearInterval(eAudio);
                 //alert('clearInterval eAudio'+ InT.toFixed(1));
              };
          },50);
       };
   };

   function audioVolumeOut(q){
       if(q.volume){
          var InT = 0.4;
          var setVolume = 0;  // Target volume level for old song 
          var speed = 0.005;  // Rate of volume decrease
          q.volume = InT;
          var fAudio = setInterval(function(){
              InT -= speed;
              q.volume = InT.toFixed(1);
              if(InT.toFixed(1) <= setVolume){
                 clearInterval(fAudio);
                 //alert('clearInterval fAudio'+ InT.toFixed(1));
              };
          },50);
       };
   };