Comment #1 on issue 645 by [email protected]: midiInstrument +
\transposition + \partcombine = wrong MIDI output
http://code.google.com/p/lilypond/issues/detail?id=645
While testing a template, which I hoped would avoid such issues, I happened
to find that midiInstrument is not an essential ingredient.
% A \transposition event while voices are 'a duo' in \partcombine
% can leak into the previous MIDI channel
\score {
<<
\new Staff {
\key c \major
c'' c'' % Midi output, from 2.12.3 or 2.13.35, is c'' bes'
}
\new Staff {
\key d \major
\transposition bes
\partcombine
{
a'
\transposition bes
d'
} {
d'
d'
}
}
>>
\layout{ }
\midi{ }
}
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