Music visualizer Histogram

gistfile1.txt

 globalobj.analyser = Howler.ctx.createAnalyser();
 Howler.masterGain.connect(globalobj.analyser);
 globalobj.analyser.connect(Howler.ctx.destination);

ico.music.visual = function(v)
{
     if (!v || !globalobj.analyser)
         return 1;
 
     var bufferLength = globalobj.analyser.frequencyBinCount;
     var dataArray = new Uint8Array(bufferLength);
     globalobj.analyser.getByteTimeDomainData(dataArray);
     var f = Math.berp(0, 256, dataArray[0])+0.5;
     var g;
     if (f > 1.0)
         g = Math.lerp(1.0, 1.01, v/100)
     else if (f  < 1.0)
         g = Math.lerp(1.0, 0.99, v/100);
     return f*g;
}