Hi Peter,
Am 23.04.25 um 05:41 schrieb Peter X:
I’m trying to figure out how to print the MIDI number of each note in
a score using a Scheme engraver — for example, I’d like c' to print as
60, d' as 62, etc., during compilation.
Here is a simplified example of the kind of input I’m working with:
\version "2.24.4"
\score {
\new Staff {
\new Voice {
\clef treble \key c \major \time 4/4
c'4 d'4 e'4 f'4 |
g'4 a'4 g'2 |
}
}
}
My goal is: When this file compiles, each note’s MIDI number is
printed to the terminal.
🎵 Found pitch c' → MIDI: 60
🎵 Found pitch d' → MIDI: 62
This is actually a nice example for a really simple engraver.
\version "2.24"
MIDI_pitch_engraver =
#(lambda (context)
(make-engraver
(listeners
((note-event engraver event)
(let ((pitch (ly:event-property event 'pitch)))
(format #t "- Found pitch ~a~a → MIDI: ~a\n"
(note-name->string pitch)
(1+ (ly:pitch-octave pitch))
(+ 60 (ly:pitch-semitones pitch))))))))
\layout {
\context {
\Voice
\consists #MIDI_pitch_engraver
}
}
\score {
\new Staff {
\new Voice {
\clef treble
\key c \major
\time 4/4
c'4 d'4 e'4 f'4 |
g'4 a'4 g'2 |
}
}
}
Lukas
