Re: How to handle changing transpositions

[Jan-Peter Voigt]

Hi Urs,

I updated the snippet in oll (master). It compiles with 2.9.15 (and should with 2.9.16).
There was an old try to automatically insert a timesignature, when the transposition changed. I tried with broadcast-stream-event (or thelike), which didn't do the trick. That part is not essentially needed, but it would be nice, if time-signatures would be printed, when the instrument-transposition changes.

For now it should work. If there is a problem, when a music-_expression_ is used more than once, give me another note.

Best, Jan-Peter


On 07.10.2014 12:03, Urs Liska wrote:

Unfortunately the snippet doesn't run on current LilyPond versions.

Running on 2.18.2 works

Running 2.19.4 throughout 2.9.11 works but gives a warning:

Interpreting music...

warning: Event class should be a list

Running 2.19.16 doesn't compile and outputs:

Parsing...

Interpreting music.../home/uliska/git/openlilylib/openlilylib/editorial-tools/auto-transpose/definitions.ily:64:18: In procedure ly:make-stream-event in _expression_ (ly:make-stream-event (quote key-change-event) (quasiquote #)):

/home/uliska/git/openlilylib/openlilylib/editorial-tools/auto-transpose/definitions.ily:64:18: Wrong type argument in position 1 (expecting pair): key-change-event

When looking in the definitions file I see that there's nothing I can do about it, so I have to ask you politely to update that snippet. If it can be fixed it would be good to use the lilypond-version-predicates from https://github.com/openlilylib/openlilylib/tree/master/general-tools/lilypond-version-predicates
to make the function generally accessible (i.e. execute the right code depending on the used LilyPond version).