On Wed 09 Feb 2022 at 18:52:52 (+0100), David Kastrup wrote: > David Wright <lily...@lionunicorn.co.uk> writes: > > On Wed 09 Feb 2022 at 14:24:14 (+0000), Valentin Petzel wrote: > >> > >> I think Alasdair does not want to specify relative at toplevel, but > >> he has his voices in multiple consecutive parts, and he wants the > >> whole voice to be relative, instead of each part being separately > >> relative. This can of course simply be done using \relative pitch > >> {\partA \partB ...}. > > > > I think you've misinterpreted "part" as part of a movement, rather > > than part being an instrumental part. > > > > The OP will want to set the music as: > > > > movement1_part1 = { notes, notes, and more notes } > > movement2_part1 = { notes, notes, and more notes } > > movement3_part1 = { notes, notes, and more notes } > > > > to do what they posted, ie, > > > > \relative c { \movement1_part1 \movement2_part1 \movement3_part1 } > > > > This will enable them to set part2 for a high- or low-pitched > > instrument with one modification, and without changing the > > pitch of part1: > > > > \relative c' { \movement1_part2 \movement2_part2 \movement3_part2 } > > > > or > > > > \relative c, { \movement1_part2 \movement2_part2 \movement3_part2 } > > I find that a pretty bad idea since changes in \movement1_part1 can > shift the octave of movement2_part1 around. I think it makes more sense > to do octave shifts via \transpose rather than tieing the internals of > one passage to the next passage at a completely different place in the > source.
I agree entirely. And being a non-schemer, if I wanted to do what the OP does, I would likely use an external method to achieve it (like awk/sed). I've never transposed a single part, but I do, for example, have an automatic system for transposing Anglican chants into keys that fit into a sequence. That's straightforward, of course, just changing \score { \transpose f f \new ChoirStaff << … >> }. So my post wasn't an idea for an implementation, but a more extended illustration of what the OP's meaning of "part" (as in partbook, or instrumental parts) implies. The OP is welcome to confirm or correct this. Cheers, David.