The left finger notes are blue and the right finger notes are green ... I do not have a 88 key keyboard but as far as I can tell it is closer to 2 LEDs per piano key. Try 'return 2*ledindex'. On the ...
The purpose of piano-chart is to allow developers to include visual representation of musical notes on a piano keyboard. See it "in action" at PianoShow.me. All you need to do to display your notes on ...