Issue 153: \once \set fails with MIDI instruments
http://code.google.com/p/lilypond/issues/detail?id=153
Comment #4 by v.villenave:
(Reproduced with 2.11.47) The ability to change the instrument on the
fly using \set
is already a cool feature, if I may.
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Issue 153: \once \set fails with MIDI instruments
http://code.google.com/p/lilypond/issues/detail?id=153
Comment #3 by hanwenn:
unfortunately, there is no place to store the pre-\once value, so it can be
restored
easily.
Chanign to enhancement, since this hasn't ever worked; perhaps it needs
cl
Issue 153: \once \set fails with MIDI instruments
http://code.google.com/p/lilypond/issues/detail?id=153
Comment #2 by hanwenn:
Nevermind this, I just checked 2.8 ; this probably never worked.
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Issue 153: \once \set fails with MIDI instruments
http://code.google.com/p/lilypond/issues/detail?id=153
Comment #1 by hanwenn:
Hi Erik,
can you have a look at this? Currently, we call Context::unset_property() which
deletes the value, but I recall that we actually used to restore the old value
