Auto beaming in unmetered music

[Benedict Singer]

Hi all,

I'm writing some un-metered music, using \cadenzaOn and putting in  
\bar "|" where I want barlines. However, the music is a lot of 8th and  
16th notes, and I'd like them beamed into quarter note groups at all  
times, i.e. 2 consecutive 8ths beam together, and 4 consecutive 16ths  
beam together. However, I've been unable to get this behavior to  
continue past the first 4 8th notes. See below for an example. LSR and  
the mailing list archives didn't turn up any solution to this, along  
with the snippets in the manual.

Thanks,
Ben

\version "2.11.62"

\paper {
  #(set-paper-size "letter")
}

notes = \relative c'' {
        \clef treble
        \key g \major
        \cadenzaOn
        #(override-auto-beam-setting '(end * * * *) 1 4)
        \set Score.beatLength = #(ly:make-moment 1 4)

        c8 fis c a c e \bar "|"
        c8 fis c a c e c d c b \bar "|"
        c8 d c b c g \bar "|"
        c8 d c b c g c fis, c' c' \bar "|"
        c,8 c, c' c' \bar "|"
        c2 r4 \bar "|"
        c,16 fis fis fis c a a a c e e e \bar "|"
        fis16 c fis fis a, c a a e' c e e d c d d b c b b \bar "|"
        
        \bar "|."
}

\score {
        \new Staff << \notes >>
        \layout { }
        \midi { }
}