When I've finished a jazz chart, I'll want to produce separate parts for
several transposing instruments, but while I'm working on the entry of the
melody and chords in concert pitch I only need to produce one .pdf file.
Obviously, I can comment out the sections I don't want during data entry
work, and remove the comments once the work is complete, but it would be
handy to be able to use a C-like construct like this:
#DEFINE NotYet
...
#IFNDEF NotYet
\book {
\bookOutputName "Chez Fernand (alto)"
\new Score
<<
\transpose f' d {\TheChords}
\new Staff
\repeat unfold 13 {
s1 \noBreak s1 \noBreak s1 \noBreak s1 \break }
\transpose f' d {\TheHead}
>>
\header {piece = "Alto Sax"}
}
#ENDIF
to suppress unwanted output for the Alto sax part (and those for the other
transposing instruments), and comment out the #DEFINE NotYet when I'm happy
with the data entry.
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