4 Beaming is generated automatically. Beams may cross bar lines. In that
5 case, line breaks are forbidden. Yet clef and key signatures are
6 hidden just as with breakable bar lines.
10 \score { \context Staff \notes \relative c'' {
21 [c8 c,4 c'8] % should warn here!
22 [c8 c c] c8 % over barline
25 [c32 c16 c8 c32] % hmm ?