Urs Liska <u...@openlilylib.org> writes:

> Am 01.12.2015 um 15:48 schrieb Gilles THIBAULT:
>>> OK, this one is more straightforward...
>> ...but your idea was probably the best :
>
> :-)
>
> Thank you for your input and sorry I didn't have time to reply earlier.
> Maybe "best" is also a matter of use case here, but I have the
> impression that in this case a simple lookup *is* the most
> straightforward solution. In the light of your suggestions I would add a
> second lis producing flats instead of sharps, though.
>
> Still I think there should be a built-in solution. When LilyPond does
> transpositions and similar operations doesn't it work on semitones
> either, converting to and from?

Not really.  \transpose c bis' is a non-trivial transposition whereas it
does not change the semitone.

LilyPond does transposition by strictly maintaining the scale steps,
then fixing up accidentals and octaves to match.

-- 
David Kastrup

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