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

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