Nonsense. Lilypond isn't exactly pretty, but in my experience with it (years ago), I never had to drop into Scheme to typeset ordinary music.

But to address the OP's question, if you can get at MIDI-format data, there's MIDI to convert it into Perl data structures.

In reply to Re^4: listen to a midi keyboard by educated_foo
in thread listen to a midi keyboard by kontrapunktstefan

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