Hi Peter,
On Tue, Apr 22, 2025 at 11:42 PM Peter X <peterandu...@gmail.com> wrote:
> 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.
>
%< snip >%
> What is the proper or recommended way to extract and print the MIDI number
> of each note in a LilyPond score?
> I’d really appreciate any working examples or pointers. Thank you very
> much!
Engravers are something I never have been able to figure out - still
working my way through learning Scheme. However, I was able to put together
some code that runs in a NoteName context that comes pretty close to what
you asked for. Whether it's proper or recommended I doubt. But it works ...
more or less. The output is:
Starting lilypond 2.24.4 [test_midi_numberV2.ly]...
Processing `/home/michael/Downloads/test_midi_numberV2.ly'
Parsing...
Interpreting music...
🎵 Found Pitch: c3 → MIDI: 60
🎵 Found Pitch: d3 → MIDI: 62
🎵 Found Pitch: e3 → MIDI: 64
🎵 Found Pitch: f3 → MIDI: 65
🎵 Found Pitch: g3 → MIDI: 67
🎵 Found Pitch: a3 → MIDI: 69
🎵 Found Pitch: g3 → MIDI: 67
If that's close enough, then the code is:
\version "2.24.4"
simplePitchDebugTwo =
#(lambda (pitch ctx)
(ly:message "🎵 Found Pitch: ~a~a → MIDI: ~a"
(note-name->string pitch)
; Next line sets middle C to C3 - change 3 to 4 to get C4 as
middle C
(+ (ly:pitch-octave pitch) 3)
(+ (ly:pitch-semitones pitch) 60))
; LilyPond complains about missing markup list without the next line
(markup #:null))
music = {
\clef treble
\key c \major
\time 4/4
c'4 d'4 e'4 f'4 |
g'4 a'4 g'2 |
}
\score {
\new Staff <<
\new Voice {
\music
}
\new NoteNames {
\set noteNameFunction = #simplePitchDebugTwo
\music
}
>>
}
Still trying to get my head wrapped around the whole engraver thing. Ah
well ... someday. Hopefully this'll be close enough to serve for now.
--
Michael
