Re: Cross-staff beaming

[address@hidden]

On May 29, 2011, at 3:00 PM, Carl Sorensen wrote:

> On 5/29/11 5:42 AM, "Hilary Snaden" <address@hidden> wrote:
> 
>> Phil Holmes wrote:
>>> "Hilary Snaden" <address@hidden> wrote in message
>>> news:address@hidden
>>>> Manual beamings of cross-staff note groups are mangled, but
>>>> inconsistently. The beaming in this extract works for the first 6 bars,
>>>> then fails on beats 1 and 3 on the following bars. (Beamings on beats 2
>>>> and 4 are as they were.) Versions 2.12.2, 2.13.61 and 2.13.62 behave in
>>>> the same way.
>>> 
>>> Could you prepare a tiny example that demonstrates this, please? (See
>>> http://lilypond.org/website/bug-reports.html)
>> 
>> The original example showed that the beam-mangling didn't start (in the
>> real-world case) for several bars and that the mangling occurred only on
>> the 1st and 3rd beats of the original 4/4. (Bugs within bugs?)
> 
> The beam-mangling is unrelated to the bar number (with the possible
> exception of bar 1).  It also can easily be made to occur on beats 2 and 4.
> See the code below for an example.
> 
> It most likely is related to a particular set of pitches compared with the
> neighboring pitches; Mike Solomon would have a better idea of what is broken
> here.  Hilary, if you can get the example even smaller, it would be helpful.
> 
> HTH,
> 
> Carl

Hey Hilary,

The problematic beams are positioned with respect to the staff on which they 
start, not the staff on which they end.  You'll need to set the values much 
higher to reach the upper staff.

Cheers,
MS