> On Apr 27, 2016, at 3:57 AM, lilypond-user-requ...@gnu.org wrote:
>
> Message: 4
> Date: Wed, 27 Apr 2016 10:56:53 +0200
> From: Gianmaria Lari <gianmarial...@gmail.com>
> Subject: duration using variable
>
> In the previous example the cC variable contains a quarter note (and a
> quarter bichord) and I would like to change it to an half note. I tried
> with the "changePitch.ly" snippet (
> http://gillesth.free.fr/Lilypond/changePitch/changePitchDoc-sources/changePitch-doc.pdf)
> writing
>
> \changePitch {a2} \cC
>
> but this does not work.
I think that is because at the time \changePitch is invoked, \keepWithTag has
not yet been invoked and changePitch removes the tags as can be demonstrated
with displayLilyMusic:
\displayLilyMusic \changePitch {a2} \cC
So there’s no chance for the two \keepWithTag expressions to do what you want.
>
> Here it is the whole code
<snip>
> Any suggestion?
Try this:
\version "2.19.38"
\include "changePitch.ly"
mynote = c
mynoteExp = {\mynote}
mynoteDouble = {<\mynote' \mynote>}
cC = { \tag #'midiOut \mynoteDouble
\tag #'screenOut \mynoteExp }
music_screenOut =
{
\time 3/4 \clef bass
\changePitch {a2} \keepWithTag #'screenOut \cC
}
music_midiOut =
{
\time 3/4 \clef bass
\changePitch {a2} \keepWithTag #'midiOut \cC
}
\score
{
\music_screenOut
\layout {}
}
\score
{
\music_midiOut
\layout {}
\midi {}
}
HTH
Pat
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