Trying to figure out a beat grouping

[Cameron Horsburgh]

Hi folks,

I'm having trouble trying to modify the automatic beaming for a piece
I'm working on. This piece has many examples of this figure in 4/4 time:

a8 a a a16 a

I would like the beaming to be:

a8[ a] a[ a16 a]

  ___     _______
 |   |   |   |___|
 |   |   |   |   |
 |   |   |   |   |
O   O   O   O   O


but the default is

a8[ a a a16 a]

  _______________
 |   |   |   |___|
 |   |   |   |   |
 |   |   |   |   |
O   O   O   O   O


I can't figure out how to get my desired beaming. How do I tell the
beam engraver to look for semiquavers at the end of beat two to decide
whether or not to put a beam between between beats one and two?

 If the semiquavers came at the end of beat one it probably wouldn't
be that hard. Is this the sort of thing the 'begin' beam-limit type
was intended for?
-- 

Cameron Horsburgh

Blog: http://spiritcry.wordpress.com/