What the heck, I think that now would be a good time to mention an idea
I got a while ago. Afaics this would solve some of the mensural notation
problems in a relatively clean way; and further more would make entering
triplets a lot easier.
The idea is quite simply to allow durations to instead of being a tuplet
of dotcount and power-of-two to be a TRIPLET of dotcount,
power-of-two and power-of-three.
This means that i.e. 12 would be a legal duration (because 12 can be
written as a product of powers of two and three).
This way the different mensural modus could (afaics) be entered
context-freely (that is: the music wouldn't depend of the
time-signature), and when entering triplets one could substitute
c8 d8 \times 2/3 { e8. f16 g8 }
with
c8 d8 e12. f24 g12
Then the time signature would only have influence of how this was turned
into notation and not on how the durations was to be interpreted.
Over time one should make an auto-tuplet-engraver automatically grouping
triplet notes in approx. the same way as the auto-beam-engraver does,
but for a start we could add grouping syntax, like
c8 d8 [[e12. f24 g12]]
to indicate where the tuplets go. - Or perhaps the new
ligature-grouping-syntax (which I don't remember) could be used for this.
I know that strictly speaking, following this idea, any integer duration
should be allowed (not just powers of 2 and 3) - but I think that
storing the duration (2^n)*(3^m) as (n,m,0) would make things a lot
easier to cope with - and for practical purposes I see no problems in
sticking with the old times-syntax whenever one needs a non-triplet tuplet.
-Rune
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