Hi all,
I'm poking around in the reference but don't find a simpler solution.
I have a function that returns an integer that represents the semitones
over a reference (by default the middle c). From this I want to
construct a pitch so that e.g.
(pitch 2) would return the equivalent to (ly:make-pitch 0 1 0) and
(pitch 13) => (ly:make-pitch 1 0 1/2) or (ly:make-pitch 0 7 1/2)
I've implemented a lookup list like so
#(define (semitones->pitch semitone)
(let ((index (modulo semitone 12))
(octave (floor (/ semitone 12))))
(list
octave
(list-ref
'((0 0) ; c
(0 1/2) ; cis
(1 0) ; d
(1 1/2) ; dis
(2 0) ; e
(3 0) ; f
(3 1/2) ; fis % \jiPitch 2 1
(4 0) ; g
(4 1/2) ; gis
(5 0) ; a
(5 1/2) ; ais
(6 0)) ; b
index))))
but would like to find a solution that is more straightforward. Somehow
I feel LilyPond should have that function already built in.
Any suggestions?
TIA
Urs
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