If anyone is interested: I managed to extend the deadline of my master's 
composition a bit further, so in case anyone is up for tackling this issue, the 
bounty will be active until the 15th of April.


---

** [issues:#4684] Kneed beam group should keep ‘main beams’**

**Status:** Accepted
**Labels:** Bounty 
**Created:** Mon Dec 07, 2015 09:19 PM UTC by Simon Albrecht
**Last Updated:** Sun Jan 31, 2016 10:14 AM UTC
**Owner:** nobody
**Attachments:**

- 
[16.png](https://sourceforge.net/p/testlilyissues/issues/4684/attachment/16.png)
 (9.2 kB; image/png)
- 
[55.png](https://sourceforge.net/p/testlilyissues/issues/4684/attachment/55.png)
 (10.5 kB; image/png)
- 
[staircase.png](https://sourceforge.net/p/testlilyissues/issues/4684/attachment/staircase.png)
 (8.7 kB; image/png)


> Reported by Gilberto Agostinho.

If the number of beams in a kneed group changes, the result may become very 
difficult to read: Lily doesn’t keep one main beam and place the side beams 
sensibly, but instead decides from distance to the note head on each new note, 
with odd results:

~~~~
:::TeX
%% staircase.ly %%%%%%%
\version "2.19.32"
\autochange {
   c'''64[ c c32
   \repeat unfold 6 {c'''64 c c32}
   c'''64 c c32]
}
~~~~

See the other two attachments for other examples of current output vs. better 
arrangements, as well as the mailing list threads 
([user](http://lilypond.1069038.n5.nabble.com/Kneed-beams-and-changes-of-staff-td184339.html)
 and 
[bug](http://lilypond.1069038.n5.nabble.com/Kneed-beam-and-subdivisions-td184473.html)).
Elaine Gould’s esteemed opinion is referenced in 
<http://lilypond.1069038.n5.nabble.com/Kneed-beams-and-changes-of-staff-tp184339p184472.html>.


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