So recently I have got this piece for a classical guitar (probably originally for some kind of lute) - Chaconne by Anonymous from Schwerin
It's full of mysterious parentheses, and I have failed to find their exact meaning online, so maybe someone could help me here.
I'm talking about those left and right parentheses written before or after some notes.
The closest thing I could find was d'Anglabert's harpsichord ornament table. It features some similarly looking ornaments, but there is no right parenthesis because his notation covers multiple cases with a left parenthesis and preceding note.
It could be related to lute notation, but I couldn't find any examples of that.
Maybe someone has some info about these strange parentheses?