Re: Vertical gap between two simultaneous pedals

[Paolo Prete]

On Sun, Jun 14, 2020 at 5:36 PM Paolo Prete <paolopr976@gmail.com> wrote:

Hi Kieren and all,

I elaborated this solution, meanwhile, which works well but needs to be improved in the scheme part.

Then I firstly ask to all the gurus how could I arrange the \sustainOnII and \sostenutoOnII functions so to work *after* a note, as \sustainOn and \sostenutoOn do work

(note that I need to change the outside-staff-priority of the pedals line spanners "on the fly", as a tweak after the note, and not as an \override before it, as shown in the snippet below)

%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%

\version "2.19.84"

#(define pedalGapCtr 0)
#(define pedalGap 4)

pedWithGapBase = #(define-music-function (parser location type mus) (string? ly:music?)
#{  
  #(set! pedalGapCtr (+ pedalGapCtr 1))

  #(if (string=? type "Sustain") #{
    \once \override Staff.SustainPedalLineSpanner.outside-staff-priority = #(* pedalGapCtr 10005)
  #})
 
  #(if (string=? type "Sostenuto") #{
    \once \override Staff.SostenutoPedalLineSpanner.outside-staff-priority = #(* pedalGapCtr 10005)
  #})

  #mus

  #(if (eq? pedalGapCtr 2) #{
    \tweak color #green
    \tweak outside-staff-priority #(* pedalGapCtr 10000) _\markup { \draw-line #(cons 0 pedalGap) }
  #})

  #(if (string=? type "Sustain") #{ \sustainOn #})
   
  #(if (string=? type "Sostenuto") #{ \sostenutoOn #})

  #(if (eq? pedalGapCtr 2) (set! pedalGapCtr 0))
   
#})

sustainOnII = #(define-music-function (parser location mus) (ly:music?) #{ \pedWithGapBase "Sustain" #mus #})

sostenutoOnII = #(define-music-function (parser location mus) (ly:music?) #{ \pedWithGapBase "Sostenuto" #mus  #})

{
  \set Staff.pedalSustainStyle = #'mixed
 
  \sustainOnII c'4 \sostenutoOnII c' c' c'\sustainOff\sostenutoOff
  r1
  \sostenutoOnII c'4 \sustainOnII c' c' c'\sustainOff\sostenutoOff
}

%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%

HTH

Best, 

P

After looking at this snippet:

http://lsr.di.unimi.it/LSR/Snippet?id=1058

I begin to suspect there's not a solution for the problem I just highlighted: in fact in that snippet too the "new" pedal ( \sustainHalfOn ) has to be placed *before* a note, while the standard one (\sustainOn) has to be placed after.

It would be *really* great if someone finds a solution for this, because otherwise overriding pedals:

1) lead to inconsistencies in the code style (as the snippet above shows)

or

2) lead to verbose code (if we use something like \setHalfPedal c'\sustainOn )

Also, please note that a fixed gap between pedals is very important in music engraving...

Please give me feedback!

Best,

P