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Re: Piano Pedal performace across a PianoStaff

From: Mats Bengtsson
Subject: Re: Piano Pedal performace across a PianoStaff
Date: Tue, 06 Apr 2004 11:17:30 +0200
User-agent: Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.6) Gecko/20040113

Interesting, you get a SIGSEGV!

However, if you replace "Piano_pedal_performer" with
"Piano_pedal_engraver", LilyPond will process the file without
crashing. Still, it doesn't do what you want.
The next time, you try these things, remember that "_performer":s
deal with MIDI file creation, whereas "_engraver":s deal with
paper typesetting. To see the default definition of the contexts,
take a look at the file ly/engraver-init.ly.

Here's a full example file for those who want to try it out more.

\version "2.2.0"

upper = \notes\relative c'' {
  c4 d e \sustainDown b |
  c c, \sustainUp \sustainDown  d8[ c]  e8[ e \sustainUp \sustainDown] |

lower = \notes\relative c {
  f4 d \sustainUp g \sustainDown b |
  b, \sustainUp c'

\score {
  \context PianoStaff <<
    \set PianoStaff.instrument = "Piano  " % set instrument name.
    \context Staff = upper \upper
    \context Staff = lower <<
      \clef bass
  \paper {
        \context {
            \remove "Piano_pedal_engraver"
        \context {
            \consists "Piano_pedal_engraver"
  \midi { }


Michael Welsh Duggan wrote:
A pedal-event is currently performed by the staff context within
which it is declared.  As a piano's pedal tends to affect the entire
output of the piano and not just one hand, it would be nice if
pedal-events could be automatically performed across the staves in a
PianoStaff.  My instinct was to use the following:

        \context {
            \remove "Piano_pedal_performer"
        \context {
            \consists "Piano_pedal_performer"

but I can see that I was wrong.  What would be necessary to make
something like this work?  I am willing to code it, but I would
appreciate a push in the right direction.

        Mats Bengtsson
        Signal Processing
        Signals, Sensors and Systems
        Royal Institute of Technology
        SE-100 44  STOCKHOLM
        Phone: (+46) 8 790 8463                         
        Fax:   (+46) 8 790 7260
        Email: address@hidden
        WWW: http://www.s3.kth.se/~mabe

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