Re: Polymetric math

[Jean Abou Samra]

Le 19/11/2022 à 23:45, David Santamauro a écrit :
> Hi,
>
> I’m typesetting an ensemble piece in 4/4 where one instrument goes to 
> 6/4 – basically short-hand for not having to write two groups of 
> quarter note triples for a longer duration. If I follow the 
> documentation, it should be (according to the math): 2/3 * 6/4 = 12/12 
> (4/4). But the following doesn’t work:
>
> \version "2.22.2"
>
> \include "english.ly"
>
> \relative <<
>
>   \new Staff {
>
>     \time 4/4
>
>     c'4 c c c |
>
>     c4  c c c  |
>
>   }
>
>   \new Staff {
>
>     \time 4/4
>
>     \set Staff.timeSignatureFraction = 6/4
>
> \scaleDurations 2/3
>
>     c4 c c c c c
>
>   }
>
> >>
>
> This is my first sojourn into polymetrics with lilpond, so any 
> rudimentary help would be appreciated.



Interestingly, someone else asked about the exact same misunderstanding 
not long ago.

https://lists.gnu.org/archive/html/lilypond-user/2022-10/msg00362.html

TL;DR: mind the braces.

Best,
Jean

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