Re: beams in a two quarter bar

[Carl D. Sorensen]

On 12/29/08 3:56 PM, "Neil Puttock" <address@hidden> wrote:

> Hi Stefan,
> 
> 2008/12/29 Stefan Thomas <address@hidden>:
>> Dear lilypond-users,
>> I have the following, I guess very simple problem, that I can't solve.
>> How can I get the beams in the below quoted example automatically?
> 
> I'm afraid this is more complicated than it used to be, since you need
> to do two things:
> 
> - revert the default auto-beam setting (as described here:
> http://lilypond.org/doc/v2.12/Documentation/user/lilypond/Beams#Setting-automa
> tic-beam-behavior),
> using revert-auto-beam-setting.
> 
> #(revert-auto-beam-setting '(end * * 2 4) 1 4)
> 
> 

This reversion is necessary in all cases, and I think we should get rid of
it so it's not necessary, since the default beatLength will produce this
beaming.

Once you have reverted the undesired auto-beam setting, you have three ways
to set the desired auto-beam setting:

1) use #(override-auto-beam-setting '(end * * 2 4) 2 4)

2) use \set beatGrouping = #'(2)
 
or
3) adjust the beatLength.

> override the default beatLength so it's no longer one crotchet;
> instead make it the length of the bar:
> 
> \set beatLength = #(ly:make-moment 1 2)
> 


My preference is to use beatGrouping, because it's the most intuitive to me.

Here's a snippet that shows all three methods in use.

\version "2.12"

\score {
  \relative c' {
    \time 2/4
    c'8 d e f
#(revert-auto-beam-setting '(end * * 2 4) 1 4)
#(override-auto-beam-setting '(end * * 2 4) 2 4)
    c8 d e f
#(revert-auto-beam-setting '(end * * 2 4) 2 4)
    \set beatLength  = #(ly:make-moment 1 2)
    c8 d e f 
    \set beatLength  = #(ly:make-moment 1 4)
    \set beatGrouping = #'(2)
    c8 d e f
  } 
} 


Thanks,

Carl