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|
\version "2.2.0"
\header{ texidoc="
@cindex polymetric music
@cindex scaling durations
It is possible to have multiple time signatures, each one in an own staffs,
at the same time, and have even a proper vertical alignment of the different
durations. This is done, firstly, by setting a common time signature for
each staff but replacing it manually using @code{timeSignatureFraction} to
the desired fraction, and secondly, by scaling the printed durations to
the actual, polymetric durations.
In this example, music with the time signatures of 3/4, 9/8 and 10/8 are
used in parallel. In the second staff, shown durations are multiplied by
2/3, so that 2/3 * 9/8 = 3/4, and in the third staff, shown durations are
multiplied by 3/5, so that 3/5 * 10/8 = 3/4.
"
}
#(define ((scale-music-function fraction) x)
(ly:music-compress x (ly:make-moment (car fraction) (cdr fraction))))
\score {
\notes \relative c' <<
\new Staff {
\time 3/4
c4 c c | c c c |
}
\new Staff {
\time 3/4
\set Staff.timeSignatureFraction = #'(9 . 8)
\apply #(scale-music-function '(2 . 3))
\repeat unfold 6 { c8[ c c] }
}
\new Staff {
\time 3/4
\set Staff.timeSignatureFraction = #'(10 . 8)
\apply #(scale-music-function '(3 . 5))
{ \repeat unfold 2 { c8[ c c] }
\repeat unfold 2 { c8[ c] }
| c4. c4. \times 2/3 { c8 c c } c4 }
}
>>
\paper { raggedright = ##t }
}
|
