3 Slurs should look nice and symmetric. The curvature may increase
4 only to avoid noteheads, and as little as possible. Slurs never
5 run through noteheads or stems.
13 \stemBoth a ( \stemDown a \stemBoth ) a a( c )a a( e' )a, a( g' )a,
17 \stemBoth c ( \stemUp c \stemBoth ) c c ( a ) c c( d, )c' c( f, )c'