Re: change Pitch, strange behavior

[Alexander Kobel]

Valentin Villenave wrote:
2009/11/27 Alexander Kobel <n...@a-kobel.de>:
But... it's nothing to do with \changePitch. Remove this command, and the
result looks the same.

I disagree (see below).
Hey, but I disagree, too (see below)! *squeak* ;-)

The reason why the rests "look strange" is
that the change Pitch gives them a different "pitch" and therefore
affects their vertical placement.
Nope. Look at the first staff of the attached snippet. There, the first 
argument is running out of notes, and the rests stay on top. No matter 
if \changePitch was used or not.

Gilles, perhaps it might be worth
adding a filter to leave rests alone?
Well, something actually goes wrong there; which seems to be the case 
when both voices have rests at the same positions. Did not dig into it, 
but see for yourself in the second staff of the snippet.
Uhm, by the way: Do we have the same version of \changePitch? I use the 
one Stefan linked in his initial mail on this subject, which seems to be 
the most recent one. Right?
  http://lists.gnu.org/archive/html/lilypond-user/2009-11/msg00556.html

I'm not gonna add a new issue named "\partcombine sucks" -- we already
know it does :)
+1.

Valentin, if you did not gave up on \partcombine yet, feel free to add
another bug: \partcombine (also) sucks if the user tries to force it to deal
with music extracts of different lengths.
Does it? The following snippet looks fine to me:
{
  c'1
  \partcombine { d' d' d' d' } { d' c' c' }
  c'
}

Well, admitted. Here you have a point. Let's say,
  ln -s /dev/null /usr/share/lilypond/bugs/partcombine
  echo "\partcombine (also) sucks (at least) if it's given an input 
ending in a rest and a shorter second argument." >> 
/usr/share/lilypond/bugs/partcombine
See the last staff, with r instead of d in the last quarter of the first 
argument your example.


So, and now off I go, to a brithday party, and work on changing my very 
own pitch.

Cheers,
Alexander
<<inline: cp.png>>\include "changePitch.ily"

oben        = { e''' 4. g'''  gis'''4 g'''4. r r4 | }
obenNoRests = { e''' 4. g'''  gis'''4 g'''4. g''' g'''4 | }
untenI      = { g''4.   bes'' c'''4   es'''4. }
untenII     = { g''4.   bes'' c'''4   es'''4. r r4 | }
untenIII    = { g''4.   bes'' c'''4   es'''4. s s4 | }

\new Staff { R1 \partcombine \oben \untenI \bar "||"
             R1 \partcombine \obenNoRests \untenI \bar "||"
             R1 \partcombine \oben { \changePitch \oben \untenI } }
\new Staff { R1 \partcombine \oben \untenII \bar "||"
             R1 \partcombine \obenNoRests \untenII \bar "||"
             R1 \partcombine \oben { \changePitch \oben \untenII } }
\new Staff { R1 \partcombine \oben \untenIII \bar "||"
             R1 \partcombine \obenNoRests \untenIII \bar "||"
             R1 \partcombine \oben { \changePitch \oben \untenIII } }

\partcombine { d' d' d' r } { d' c' c' }
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