Re: polyrhythm with multiple tempi

[Lukas-Fabian Moser]

Hi Kieren,

Am 10.12.19 um 22:54 schrieb Kieren MacMillan:

Hi all,

Please consider the following snippet:

%%%  SNIPPET BEGINS
\version "2.19.83"

\layout {
   \context {
     \Score
     \remove "Timing_translator"
     \remove "Default_bar_line_engraver"
     \remove "Metronome_mark_engraver"
   }
   \context {
     \Staff
     \consists "Timing_translator"
     \consists "Default_bar_line_engraver"
     \consists "Metronome_mark_engraver"
   }
}

slower = {
   \tempo 4=80
   \scaleDurations 120/80 { \repeat unfold 12 { c'4 } }
}

faster = {
   \tempo 4=120
   \repeat unfold 16 { c'4 }
}

\score {
   <<
     \new Staff \slower
     \new Staff \faster
   >>
}
%%%  SNIPPET ENDS

The polyrhythm stretches out and lines up as expected, but I can’t seem to get 
the barlines to offset [despite moving the engravers I thought were required]. 
Corrections/hints appreciated.

\scaleDurations does not scale the measure length as well. Try inserting

  \set Timing.measureLength = #(ly:make-moment 12/8)

in the \slower part.

See you in Salzburg!
Lukas