.HP Scanjet 3C as the vocals. It lags a bit due to the fast paced vocals. In order for the stepper motor to play a note it has to be moving and with that large carriage it takes a few milli seconds before it can play a note. It doesn't sound like a lot of time but stretch that over a 4 minute song and voila...out of sync. Programming does help to compensate but it is not perfect.Amiga 600 Bass on left audio output and Guitar on right audio outputEach audio channel was feed into an oscilloscope2 Harddrives as the drums and cymbalXylophone as the Xylophone (duh) my apologies glockenspielBoth the Harddrive and Xylophone are controlled by one PIC16F84A mircocontrollerthanks to A1- Electronics Parts (Toronto) for the great deals on all those old parts that are getting harder to find