Re: TimeSignature with note in denominator

[Aaron Hill]

On 2021-11-15 3:30 am, David Kastrup wrote:
> Not everyone picking 6/8 unambigulously wants to see this interpreted 
> as
> 2 notes of 4. duration.  So forcing a particular duration expressing a
> length not inherently specified is putting words in the composer's
> mouth.

I agree.  6/8 communicates precisely six eighth notes--nothing more, 
nothing less.  While 2/4. might be a common conventional feel, it is not 
a hard-and-fast rule.

And correct me if I am wrong, but the problem you stated about 20 not 
being a duration (as Lilypond defines it) is that it is not a *singular* 
duration.  For instance, all of these durations have the same length 
(moment) of 1/20:

1*1/20
4.*2/15
16*4/5

Writing "\time 8/20" leaves one wondering how that /20 should be 
rendered if not as a simple number.

Writing "\time \musicFraction 8 \tuplet 5/4 { 16 }" lets the composer be 
explicit about the intention.


-- Aaron Hill