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List:       lilypond-bug
Subject:    Re: beam settings
From:       "Trevor Daniels" <t.daniels () treda ! co ! uk>
Date:       2008-12-25 10:45:00
Message-ID: 50CECA8CABB9437CA929F7D8447907D7 () TrevorLaptop
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Carl D. Sorensen wrote Thursday, December 25, 2008 12:21 AM

> On 12/24/08 3:31 PM, "Trevor Daniels" <t.daniels@treda.co.uk> wrote:
>
>> Herbert Liechti wrote Tuesday, December 23, 2008 6:40 AM
>>
>>> Neil Puttock schrieb:
>>>> 2008/12/22 Trevor Daniels <t.daniels@treda.co.uk>:
>>>>
>>>>> Reinhold Kainhofer wrote Monday, December 22, 2008 4:22 PM
>>>>
>>>>>> He sent me the whole file and the culprit is a PianoStaff, which 
>>>>>> seems
>>>>>> to
>>>>>> somehow override the score's beamGrouping. So, one cannot use
>>>>>>     \set Score.beatGrouping = #'(1 1 1 1 1 1)
>>>>>> but rather has to use
>>>>>>     \set Staff.beatGrouping = #'(1 1 1 1 1 1)
>>>>>> Then the beaming also works fine for staves inside a PianoStaff.
>>>>>>
>>>>> Hmm.  Does that mean that context properties set at the Score
>>>>> level are inherited by the Staff context only if there is no
>>>>> interposed staff grouping?
>>>>
>>>> I've never noticed this to be the case; I think we need to see
>>>> Herbert's file to work out whether there's something else that's
>>>> influencing this behaviour.
>>>>
>>> I'm attaching the file. I already changed the beatGrouping from
>>> Score to Staff context.
>>
>> I've tracked down the problem here.  It is nothing to to do with the
>> PianoStaff.  It is due to placing a second \time command in the lower
>> staff.  Here's an extract from the score which shows the problem
>> clearly.  Uncomment the second \time command and the
>> beamGrouping override in the Score context fails in both staves.
>> Specify \time in only one staff and it works fine in both staves.
>>
>> \score {
>>   <<
>>     \new Staff {
>>       \time 6/8
>>       \set Score.beatGrouping = #'(1 1 1 1 1 1)
>>       \repeat unfold 6 { \times 2/3 { bes16 as es }  }
>>     }
>>     \new Staff {
>> %      \time 6/8
>>       \repeat unfold 6 { \times 2/3 { bes16 as es }  }
>>     }
>
> Aha!  This makes sense.  This is because time 6/8 sets beatGrouping to (3
> 3).  And beatGrouping doesn't live on the Staff level.
>
> This probably becomes a documentation bug.

OK.  I'll fix the docs.

Trevor




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