> Graham Percival wrote:
> 1. Look at the selected snippets for \transpose.
> There's an example that's very close to what he
> wants.
I disagree.
That example modifies the enharmonic spelling of
notes in an already transposed section. We're looking
for a function to transpose each note individually by
the appropriate interval determined by its scale-
degree within a specfied tonality.
input:
\relative c' { \key c \major c4 d e f g a b c }
output:
\relative c' { \key c \major g4 a b c d e f g }
> 2. Look at
> { \displayMusic { a ais d dis } }
> to get some info about how lilypond treats
> pitches. The idea is to write a function that
> translates "a ais" into "d dis".
Not at all. The idea is to write a function that,
given the key of C major, translates "a b" into
"e f".
> 3. Modify the existing example so that instead of
> producing notes with few accidentals, it changes
> the notename by the desired interval.
How is this helpful? This reminds me of the Monty
Python skit on how to play the flute: "You blow
there and you move your fingers up and down here."
Besides, this doesn't account for the fact that
different notes will need to be transposed by
different intervals.
> If you cannot, or will not, describe what you
> actually want, it's very difficult to help you.
He already has! He clearly stated that he wants to
transpose music down a 4th, diatonically:
http://lists.gnu.org/archive/html/lilypond-user/2008-12/msg00557.html
If you don't know what diatonic means, look it up!
So far, the only post that offers promise is from
John:
http://lists.gnu.org/archive/html/lilypond-user/2008-12/msg00591.html
but the programming is too tricky for me.
So John, if you get a chance to flesh this out, that
would be awesome.
Thanks.
- Mark
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