Re: beam-settings for triplets and sixtuplets

[Trevor Daniels]

Stefan

The default behaviour is to end 1/8 triplets at 1/4 beats in 4 4 time.
So to beam sextuplets you need to revert the default beaming rules
which end 1/12 notes at the 1/4 and 3/4 beats.

The relevant default rules are (see scm/auto-beam.scm):

   ((end * * 4 4) . ,(ly:make-moment 1 2))
   ((end 1 12 4 4) . ,(ly:make-moment 1 4))
   ((end 1 12 4 4) . ,(ly:make-moment 3 4))

so I think this will do what you wanted:

AT = #(define-music-function (parser location x) (ly:music?)
#{
%  #(override-auto-beam-setting '(end 1 12 * *) 1 4 'Staff)
%  #(override-auto-beam-setting '(end 1 12 * *) 2 4 'Staff)
%  #(override-auto-beam-setting '(end 1 12 * *) 3 4 'Staff)
 \set tupletSpannerDuration = #(ly:make-moment 1 4 )
 \times 2/3 { $x } \unset tupletSpannerDuration
 #(revert-auto-beam-setting '(end 1 12 4 4) 1 4 'Staff)
%  #(revert-auto-beam-setting '(end 1 12 * *) 2 4 'Staff)
 #(revert-auto-beam-setting '(end 1 12 4 4) 3 4 'Staff)
#})

Trevor

----- Original Message ----- 
From: "Stefan Thomas" <address@hidden>
To: "lilypond-user" <address@hidden>
Sent: Monday, January 05, 2009 3:06 PM
Subject: beam-settings for triplets and sixtuplets


> Dear Lilypond-users,
> in the following snippet I changed succesfully the beam-settings for
> 8th-triplet.
> But I couldn't revert it, for the sixputplets.
>
> Here the example:
>
> \version "2.12.0"
> AT = #(define-music-function (parser location x) (ly:music?)
> #{
>
>  #(override-auto-beam-setting '(end 1 12 * *) 1 4 'Staff)
>  #(override-auto-beam-setting '(end 1 12 * *) 2 4 'Staff)
>  #(override-auto-beam-setting '(end 1 12 * *) 3 4 'Staff)
>  \set tupletSpannerDuration = #(ly:make-moment 1 4 )
>  \times 2/3 { $x } \unset tupletSpannerDuration
>  #(revert-auto-beam-setting '(end 1 12 * *) 1 4 'Staff)
>  #(revert-auto-beam-setting '(end 1 12 * *) 2 4 'Staff)
>  #(revert-auto-beam-setting '(end 1 12 * *) 3 4 'Staff)
> #})
>
> \new Staff \relative { \time 4/4    \AT { d 8 e f g f e f e d  f e d}
> %the beams behave like expected
> \times 4/6 { c8 d e f e d } \times 4/6 { e f g a g f} %the beams,
> unfortunatley, don't behave like expected
> }
>
>
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