> I’d ask since I’m not getting a satisfactory answer on the Arduino forums or > elsewhere. Some links about how to do it here: http://www.arduino.cc/cgi-bin/yabb2/YaBB.pl?num=1169703529/all And here is a nice schematic: http://tomscarff.tripod.com/cv2midi/cv2midct.gif Look at the yellow section .. ; -- Jay Vaughan