Classical music is also one of my interests, and I was intrigued by the following story.
Hyperion released a CD of music by Lalande (1657-1726) called 'Music for the Sun King'. A Dr Lionel Sawkins has taken them to court for royalties on the grounds that he has edited the work, although, all he has done is publish it.
The court has found in his favour!
Other Scholars seem quite happy with the usual arrangement of a one off 'Editing Fee', and as one points out, Hyperion are going to be vary wary of producing works in future which make little profit anyway if they also have to pay royalties to acedemic researchers.
This could open a right can of worms, think I will start editing the works of that famous composer Anon!

FC