When Thomas Adès switches from 4/4 to 4/5, there is no way of knowing
which "graphical" note length (combination of notehead style and flag
count) is supposed to be used for the basic unit (of which 4 make up a
bar, and of which five equal the duration of a semibreve).
Example:
\version "2.22"
\relative {
\time 4/5
c'4*4/5 c c c
\time 4/5
c'8*8/5 c c c
}
Which one of those bars is more natural than the other, and why?
If you're tempted to answer "the first one, since 1/5 is very close to
1/4 and should therefore be represented by crotchets", then what about
the following?
\version "2.22"
\relative {
\time 4/6
c'4*4/6 c c c
\time 4/6
c'8*8/6 c c c
}
(BTW, there's a "strange time signature" warning, but only for the
second \time in each of the examples. This seems to be a bug.)
Lukas