Hello everybody again, quite some time ago I build a Midibox SID and I am really happy with it but now I have some time left and I am ready for my next project: I want to build a controller for Ableton Live (who doesn't? ;-). I want it to be a button matrix of 12x12 buttons. Every button has a LED (maybe even RGB) that goes with it. Each button will send a control message with a parameter. Further it should work as a button matrix to reduce the wiring and DIN modules. So the first button w