http://lsr.di.unimi.it/LSR/Item?id=873 may help.
... and for Piano Staves, I condensed this in a minimal & ready-to-use example:
http://lilypond.1069038.n5.nabble.com/Unconnected-simultaenous-staff-groups-tp206812p206820.html Lukas _______________________________________________ lilypond-user mailing list lilypond-user@gnu.org https://lists.gnu.org/mailman/listinfo/lilypond-user
