Re: Beaming regression 2.15.39 compared to 2.14.2

[Colin Hall]

On Thu, May 24, 2012 at 05:13:55PM +1000, Nick Payne wrote:
> In 2.14.2, the output for the second bar beams all five eighth notes
> together, as I would expect. In 2.15.39, the first eighth note is
> not beamed with the others:
> 
> \relative c'' {
>     \time 3/4
>     c8 c c c c c
>     r c c c c c
> }

Hi Nick,

Thanks for reporting this unexpected behaviour and for stimulating
some useful discussion. It seems that:

Default beaming for this case changed from 2.14.2 to 2.15.39.

A workaround has been provided to restore the previous behaviour.

Graham, as project manager, has confirmed this should not be classed as a 
regression.

Phil Holmes has identified the change to beaming that is most likely 
responsible.

http://code.google.com/p/lilypond/issues/detail?id=2246

which is titled "beaming in 3/4 - a setting to not beam 3 eights
against the beat" so it looks like the design is not clear.

There is an existing, open tracker for beaming in 3/4:

http://code.google.com/p/lilypond/issues/detail?id=1817

I'm creating a tracker so that someone can take up the task of
designing this feature.

http://code.google.com/p/lilypond/issues/detail?id=2566

Cheers,
Colin.

-- 

Colin Hall