Il giorno sab 16 lug 2016 alle 16:31, pkarl <jpk...@gmail.com> ha
scritto:
It would be so nifty if the following snippet produced equivalent
output in the midi file to what is produced in the pdf:
\version "2.19.38"
musicA = \relative {
\set Staff.instrumentName = "A"
\repeat volta 2 {
c''4 d e f
}
f d e c
\bar "|."
}
musicB = \relative {
\set Staff.instrumentName = "B"
c''4 d e f
f d e c
}
\score { <<
\new Staff \musicA
\new Staff \musicB
>>
\layout {}
}
\score {
\unfoldRepeats
<<
\new Staff \musicA
\new Staff \musicB
>>
\layout {}
\midi { }
}
This would greatly simplify the production of pieces with many
parallel staves.
Should this work? Is it documented that it doesn't work? Why does
it work in the pdf output? Is this a bug of \unfoldRepeats? There
are several warnings about the use of \unfoldRepeats in the Notation
Manual, but none of them seem to apply to my snippet.
So in the output of the second score's B instrument there are only two
bars instead of three, because you did not use \repeat volta in musicB.
What you want is avoiding writing explicitly \repeat volta in each
parallel staff?
I remember that I've been warned against this use in this list. And I
agree that it's better being explicit about \repeat(s) in the input
code.
I think that this warning may apply to your snippet (replace voice with
staff)?
"""
When using multiple voices, each of the voices must contain completely
unfolded repeats for correct MIDI output.
"""
http://lilypond.org/doc/v2.19/Documentation/notation/using-repeats-with-midi.html
Should it be rephrased to "When using polyphony, each of the
voice/staff..."?
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