Hi Kieren,
Question: Can the interface be made into a \tweak-able function, where the
parameters are [only] the name of the target context and the music being sent
there?
Probably this is too simple, but: In your definition
toDyn =
#(define-music-function (music1 music2) (ly:music? ly:music?)
#{
<< #music1 \new Container \new Notes { \change Container = "piano_dynamics"
#music2 } >>
#})
both "Container" and "piano_dynamics" can be replaced by variables (e.g.
string?'s passed to a function).
Lukas
