There's a long standing problem with unequally tempered key
signatures. If the accidentals aren't halves, the MIDI production
fails. I've worked out a fix. Here's the diff from my system:
*** scm/midi.scm 2011/02/20 20:32:26 1.1
--- scm/midi.scm 2011/02/20 20:33:01
***************
*** 277,283 ****
(define-public (alterations-in-key pitch-list)
"Count number of sharps minus number of flats"
! (* (apply + (map cdr pitch-list)) 2))
--- 277,283 ----
(define-public (alterations-in-key pitch-list)
"Count number of sharps minus number of flats"
! (round (* (apply + (map cdr pitch-list)) 2)))
Sometimes this puts the wrong key signature in MIDI, but that's not
something I care about at all. Rietveld shows the relevant code
hasn't changed. It has moved to line 284. At the weekend I'll look
at how to submit a snippet to show where the problem comes from.
t'other Graham
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