Re: subdivided beams partially successful

[Kieren Richard MacMillan]

Hi, James:

The "easy" way is to explicitly include a connected beam around the  
duration of a quarter note each time, q.v., the second set of six  
16th notes in

%% CODE SNIPPET BEGINS
\version "2.9"
\relative c''
{
        \set subdivideBeams = ##t
        \set Score.beatLength = #(ly:make-moment 1 8)
        \times 4/6 { c16 c c c c c } \times 4/6 { c16[ c c c c c] }
}
%% CODE SNIPPET ENDS

There's probably a (better) way to do it using Lilypond's auto-beam- 
settings, but I don't know enough about it to give you that answer.

Good luck!
Kieren.