Hi Kieren,
If they’re in the same file (which they appear to be), then I believe the MIDI
output of your second \score block — the non-detuned one! — will overwrite the
MIDI output of the first one. You need to have separate files (or at least
separate \book blocks, with explicit and different target file names) in order
to output two separate MIDI files.
I think you're mistaken:
\version "2.22.0"
music = { c' }
\score {
\music
\layout {}
\midi {}
}
\score {
\music
\midi {}
}
generates test.midi and test-1.midi.
Lukas