Re: Workaround for issue on tuplet of skips

[Jean Abou Samra]

Le dimanche 19 février 2023 à 02:09 +0100, Paolo Prete a écrit :

Hello LilyPonders,

Currently, I checked that Spontini-Editor has an incompatibility with LP 2.25.x (it works well with 2.24.x branch) due to this bug:

https://gitlab.com/lilypond/lilypond/-/issues/6482

More specifically, the incompatibility happens when hidden tuplets of skips, which don't compile in the 2.25.x series, are dynamically created by the cross-staff libraries of the editor, e.g:  \tuplet 3/2 {s8 s s}
Of course I'll wait that the LP issue gets fixed, but given that it can take some time, I'm considering to work around it, meanwhile, with a Scheme filter that does the following transformation:

{ c' d' \tuplet 3/2 { s8 s s } f'  \tuplet 5/4 { s4 s s s s } }    

becomes

{  c ' d' s8 s f'  s4 s s s } }

(NOTE: skips inside the tuplets have no articulations, nor dynamics etc.)

Therefore I gently ask: is it trivial to write such a Scheme function? If simple, how can I implement it?

NOTE 2: if the resulting Scheme code is long, I'd probably (?) wait until the issue gets fixed.

Thanks very much!

So IIUC, you want to remove tuplets that contain only skips?

Try something like this:

\version "2.25.2"

noSkipTuplets =
\musicMap
#(lambda (m)
   (if (and (music-is-of-type? m 'time-scaled-music)
            (every (lambda (e)
                     (music-is-of-type? e 'skip-event))
                   (extract-typed-music m 'rhythmic-event)))
       (ly:music-property m 'element)
       m))
\etc
toplevel-music-functions = #(cons noSkipTuplets toplevel-music-functions)

{
  \tuplet 3/2 { c'8 d' e' }
  c' d'
  \tuplet 3/2 { s8 s s }
  f'4
  \tuplet 5/4 { s4 s s s s }
}

When it encounters a tuplet with no notes inside, it removes the tuplet music wrapper, leaving only the inner (time-scaled) music.

Best,

Jean

signature.asc
Description: This is a digitally signed message part