hi
on the receiving end you can use a Midi piano to play the music, or if you have a spare 50K lying around, you can get one of these nice Midi grand pianos. You send it a signal, and the keys move to play the notes, including the sustain pedal! I have run these off Basic Stamp micros and Mac computers, they work like a charm.
BTW for a newbie this is a complex and expensive project...
D