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Re: force flat beam in piano staff that uses \autochange

From: Michael Winter
Subject: Re: force flat beam in piano staff that uses \autochange
Date: Thu, 7 Feb 2013 23:17:18 -0800

That forces the beams to be flat but if I try to put them in the middle for all of it, crazy stuff starts to happen. See example below.



\version "2.16.2"

\new PianoStaff {
  \autochange {
      \override Beam #'damping = #+inf.0
 \override Beam #'positions = #'(-4.5 . -4.5)
g''16 ais'16 e''16 ais''16 ais'16 fis''16 c'''16 a''16 ais''16 e''16 a''16 a'16 e'16 g''16 fis''16 a'16 c'''16 e16 fis''16 a'16 c'16 fis'16 c'''16 d''16 ais16 c''16 c'16 g16 a'16 g''16 c'16 d'16 c'''16 e16 d''16 c''16 g'16 e''16 c''16 d''16 ais16 fis'16 ais'16 e''16 g16 ais''16 a''16 ais16 e16 d''16 a''16 c16 ais'16 e''16 a''16 ais'16 e''16 g'16 c''16 d''16 a''16 a'16

On Feb 7, 2013, at 4:23 AM, address@hidden wrote:

Message: 4
Date: Thu, 07 Feb 2013 13:36:18 +1100
From: Nick Payne <address@hidden>
To: address@hidden
Subject: Re: force flat beam in piano staff that uses \autochange
Message-ID: <address@hidden>
Content-Type: text/plain; charset=ISO-8859-1; format=flowed

On 07/02/13 12:39, Michael Winter wrote:
This does not work when there are groups of notes beamed together that 
are either all in the upper staff or in the lower staff. I assume it 
would only work if you could guarantee that all notes grouped under a 
beam have notes in both the upper and lower staves.

Works here. The beams are flat regardless of which stave(s) the notes 
occupy. If you mean that you only want the beams forced flat where the 
notes occupy both staves, then decide which is more frequent (notes 
grouped on one stave or both), and use \once\override for the others. 
e.g. if kneed beams are more frequent:

\version "2.16.2"

nf = \once\override Beam #'damping = #1 % back to default

\new PianoStaff {
  \autochange {
    \relative c'' {
      \override Beam #'damping = #+inf.0
      b16 b b,, b
      b b b'' b
      \nf b cis d e
      b b b,, b

p.s. I tried using \once\revert Beam #'damping: no error was indicated 
but the \once is ignored...

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