3 % from upper staffline (position 4) to centre (position 0)
4 \property Voice.beamVerticalPosition = #4
5 \property Voice.beamHeight = #-4
8 % from center to one above centre (position 2)
9 \property Voice.beamVerticalPosition = #0
10 \property Voice.beamHeight = #2
13 % normal beam-algorithm
14 \property Voice.beamHeight = ##f
15 \property Voice.beamVerticalPosition = ##f