> [...] As you can deduce from the existence of the \chordRepeats > function, the substitution of q is not immediate. In contrast, > \tweak takes effect immediately by modifying each of the notes in > the chord. Since there are no notes yet in the "q" chord at the > time \tweak is applied (they are copied later from the previous > chord), \tweak does nothing. [...] > > On the other hand, in this case, there is little \tweak \could do > that \override cannot do. The main purpose of \tweak is to be used > if you want to modify only one of the notes in a chord, but without > writing out each of the notes instead of putting "q", you don't make > room for this. So, just use an \override here.
Shouldn't this be documented in the NR? It's certainly not obvious to Joe User... Werner