5 Stem tremolos or rolls are tremolo signs that look like beam segments
6 crossing stems. If the stem is in a beam, the tremolo must be parallel
7 to the beam. If the stem is invisible (e.g. on a whole note), the
8 tremolo must be centered on the note. If the note has a flag (eg. an
9 unbeamed 8th note), the tremolo should be shortened if the stem is up
10 and tilted extra if the stem is down.
12 The tremolos should be positioned a fixed distance from the end of the
13 stems unless there is no stem, in which case they should be positioned
14 a fixed distance from the note head.
20 \context Voice \relative c''{
22 \override TextScript #'padding = #5
23 a1:4^":4" a:8^":8" c:16^":16" a:32^":32" a^"x" a:^":"
25 a'4:4 c:8 a:16 c:32 a a: a2:
34 c,16:32 c: c c a16:32 a: a a
37 f8:256[ f,8: f':] f: \noBeam f,,: \noBeam c16:32 \noBeam c'':