Hi was wondering if it is possible to have an audio signal go into a 555 timer and come out with a vibration (or like it flicking a switch over and over really fast) sound to it. I experimented and the only thing i can get is the song with a annoying beat that covers the song at 29 hertz. Can the 555 timer just vibrate the audio signal or does it need to have the 9v going through it to? Basically i want to implement it into a guitar effects pedal but if it cant be done o well especially if it dont sound good. If it cant can you post a ic that may work instead (i cant really use micro controllers even though i could get this in a heart beat if i could i dont have enough money for one).