Choose an mp3, and move your mouse around. Hopefully the circles will disappear on the bass beat of the song ^_^....... hopefully T_T.
AS3, Yes the song plays very softly on the left balance, whilst loud on the right. The left balance is playing the song, whilst the right balance is playing the song but delayed but a few seconds. This was done in order to 'analyse' the song data in order to produce the circle effect.