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## Re: TimeSignature with note in denominator

 From: Kieren MacMillan Subject: Re: TimeSignature with note in denominator Date: Sat, 13 Nov 2021 16:40:13 -0500

```Hi David,

> A time signature is written with numbers, not durations.

Perhaps more completely (and, some might say, accurately): A time signature is
written with numbers, the second (“lower”) of which represents a musical
duration — specifically, the time signature n/d means “n events per measure,
each event having a duration equal to 1/d-th of a whole note”. e.g. 4/4 means
“4 events per measure, each event having a duration equal to 1/4th of a whole
note”, 2/6 means “2 events per measure, each event having a duration equal to
1/6th of a whole note”, etc.

>> If the entry is a duration,
> But it isn't and has never been.

I believe that Carl was using the future conditional version of “if…is” there.
;)

> There is
>          /*
>            Todo: should make typecheck?
>
>            OTOH, Tristan Keuris writes 8/20 in his Intermezzi.
>          */
>
> in lily/time-signature-engraver.cc
> Your refactoring desire does not seem to leave room for that.

Why not? 8/20 corresponds perfectly to “8 events per measure, each event having
a duration equal to 1/20th of a whole note”.

Cheers,
Kieren.
________________________________

Kieren MacMillan, composer (he/him/his)
‣ website: www.kierenmacmillan.info
‣ email: kieren@kierenmacmillan.info

```