Hello,
is there a way to modify a spanner to get a slow-fast trill (like the one in the picture)?
Obviously with user-provided glyphs.
I'm trying to figure out how spanners were written to be able to at least modify an existing one, TextSpanner or TrillSpanner, (or write one on purpose, if it's not too complicated, but I guess it is!), but I can't find the definitions.
Thank you!
Rip_mus