MIDI Piano Instructor : schematics of the PC Interface

This is part of the schematic of my MIDI piano instructor. This thing drives a bar of LEDs placed on top of a piano keyboard (electronic or regular). MIDI messages play a MIDI melody through the electronic piano or a MIDI box and also drive the MIDI piano instructor which turns on and off the LEDs according to the notes played.

More details at http:\\www.5volt.eu

Done