Re: Beams not connecting

[Hans Aberg]

On 9 Oct 2007, at 15:00, Mats Bengtsson wrote:

> The true bug, in my opinion, is that beams are subdivided, even  
> though subdivideBeams is set to ##f (which it is by
> default). This is related to bug report #11, for example, but has  
> nothing to do with triplets. See for example, the following
> example.
>
> \version "2.11.33"
> \paper{ ragged-right=##t }
> \relative c' {
>  \time 6/8
>  c8 c c16 c d8 d16 d d8 |  e8. e16 e e f8 f16 f8 f16 \break
>  \set Timing.beatLength = #(ly:make-moment 3 8)
>  c8 c c16 c d8 d16 d d8 |  e8. e16 e e f8 f16 f8 f16 }
>
> I have not been able to find any setting of beatLength or  
> beatGrouping or anything else that gives a full beam
> (without any subdivisions) for both the rhythms d8 d16 d d8
> and e8. e16 e e .

In this bug, using my language of metric subordinate accents, the  
problem is that traditionally, one mixes different metric structures.  
That is, traditionally, "d8 d16 d d8" is typeset as in the first  
occurrence, whereas "e8. e16 e e" is typeset as in the second  
occurrence.

This is OK in the music of CPP <http://en.wikipedia.org/wiki/ 
Common_practice_period>, because 3/8 is always divided as (1+1+1)/8.  
However, with other music in mind, like Leonard Bernstein song  
"America" (though it subdivide the 6 in 6/8 alternatively as 3+3 and 2 
+2+2), beaming can be used to indicate a subdivision as (3+3)/16.  
This is what the second occurrence of "e8. e16 e e" really says - but  
again, that interpretation is not possible within CPP.

So in music in general, one may need what I suggested, with a way to  
typeset in the traditional CPP music, also for modern music that does  
not demand subtleties in this respect.

  Hans Åberg