Congratulations Plankton,
I have a very similar project and I am eager to follow your footsteps. Thank you for posting your results!
Besides being able to generate sounds directly with sparkfun MI interface, or alternatively to it, I want my keyboard to send MIDI data to the computer (PC) with the help of the MIDI library.
I am not quite sure though how to receive the data on the PC side.
In particular, I need to find a program (possibly free, for the time being, while I am experimenting) that receive the MIDI data from the Arduino and plays them right away (with the WIndows GM synth table or something else). So far, no luck.
Do you have any hint or advice to point me the right way?
Thanks
Luca