On Fri, 07 Nov 2014 04:37:41 -0800, <[email protected]> wrote:
On 2014/11/06 05:44:50, Keith wrote:
Changing the current global variable 'partcombine-chord-range' will
not become
the user interface.
All I meant for that variable was to avoid repeating the same magic
numbers three times. Is there a more idiomatic way to do that in
Scheme? Should I have commented it?
No, that seems fine as it is.
I was trying to go through the possible user-interfaces systematically, and
exposing that global variable was one possible interface. I had trouble
articulating exactly /why/ simply changing that global variable wouldn't become
the user-interface.
I forgot the originally-suggested possible interface for the user to change the
chord-range, by setting some context property of the temporary Voice contexts,
the ones used by \partcombine to iterate through its inputs. Then we could
change chord-range in the middle of the music, but I'm not sure the
\partcombine logic can handle mid-music changes. The analysis is global, so if
you double-stem the e' below, probably the slurs should separate and all
slurred become double-stemmed (like \partcombine already does if there is a
voice-crossing).
\partcombine
{e'( e' b' f')}
{c'( e' g' c')}
Changing chord-range just before the e' might (or might not) fool \partcombine.
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