Re: Unwanted warnings/errors on pedals for multiple voices

[Aaron Hill]

On 2020-04-07 1:55 pm, Paolo Prete wrote:
> Look at this example (again: messy code that could be improved, and I
> gently ask Harm and/or Aaron to have a check if they can):

For starters, I would seek to eliminate the global variable, instead 
preferring state to be tied to the context in some way.  Using a custom 
context property would enable this approach to support simultaneous 
pedal markings on grouped staves.  As it is now, such multiple usage 
would corrupt the shared global.

Alternately, this alignment work seems like a better job for an engraver 
that (semi-)automatically determines which pedal markings need to be 
vertically aligned with one another.  For instance, the logic could be 
based on the duration between the end pedal and start pedal.  If too 
much time has elapsed, the pedal markings are considered distinct and 
are not aligned.  In this way, the typical usage pattern of 
\sustainOn/Off is unchanged, not requiring any new commands.  That said, 
I could see value in adding a \pedalAlignBreak of some form, to support 
cases where the engraver's logic would group markings that need to be 
kept apart.

----

Side note: Your use of \partcombine seems unnecessary when << >> exists:

%%%%
\version "2.20.0"

alfa = { b'4 g'8 a' fis'2 }
bravo = { s4*3\sustainOn s4\sustainOff }

<<
  \new Staff { \partcombine \alfa \bravo }
  \new Staff { << \alfa \bravo >> }
> >
%%%%


-- Aaron Hill