Re: Puzzled about r1 issue in 3/4 time

[Malte Meyn]

Am 23.10.19 um 23:38 schrieb Michael Gerdau:
> > > Lilypond is right, r1 is 4 beats long. What you probably want is
> > > r1*3/4 or most likely (and better) R1*3/4 instead of r1.
>
> > More like R2.
>
> What is the difference between R2. and R1*3/4 apart from the obvious difference 
> in the source file?

It’s “half with dot” vs. “whole scaled by 3/4” even in the internal 
structure which you can show with displayMusic:

\displayMusic {
  \time 3/4
  R2.
  R1*3/4
  R4*3
}

LilyPond’s Duration type makes this distinction, Moment doesn’t:

#(display (ly:duration-length #{ 2. #}))
#(display (ly:duration-length #{ 1*3/4 #}))
#(display (ly:duration-length #{ 4*3 #}))

For the output of MultiMeasureRests it doesn’t make a difference, for 
Rests and NoteHeads the choice of the duration affects the glyph choice.