in reply to listen to a midi keyboard
"...the musical notation software lilypond"
I don't know very much about MIDI but i know a little bit about musical typesetting.
IMHO you should think about a commercial solution instead of using lilypond.
Or do you really want to learn Scheme?
If so, i wish you well ;-) You need to do this if you want that lilypond does what you want.
Regards, Karl
«The Crux of the Biscuit is the Apostrophe»
In Section
Seekers of Perl Wisdom