6 3/4 beaming has special rules, that are hardcoded in the autobeam
7 routines. When the beaming is changed, beams should start at the
8 beginning of the measure. In this case, the measure should be beamed
15 \set Timing.baseMoment = #(ly:make-moment 1 8)
16 \set Timing.beatStructure = #'(3 3)
17 \set Timing.beamExceptions = #'()