Issue 754 in lilypond: \transpose should not affect \transposition

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Status: Accepted
Owner: v.villenave
Labels: Type-Defect Priority-Medium

New issue 754 by v.villenave: \transpose should not affect \transposition
http://code.google.com/p/lilypond/issues/detail?id=754

% new report from Trevor D:

The \transpose command transposes all pitches within its scope, including
the pitch supplied to the \transposition command.  This causes incorrect
MIDI output for transposing instruments.  The pitch supplied to
\transposition is a constant determined by the instrument and should never
be transposed.

\score {
 \transpose c d {
 \new StaffGroup <<
   \new Staff {
     \key c \major
     c'1
   }
   \new Staff {
     \transposition bes
     \key d \major
     d'1
   }
 >>
 }
 \layout {}
 \midi {}  % Should be a unison D, but is not
}

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