Thank you u_gee
I have successfully added the genre “Piano Misc.” When I go to the genre list it seems that I can only edit the parent genre. It is not clear to me how to assign a genre to a parent genre as a sub-genre. The only option seems to be to edit a parent genre. So I added “Piano Misc” and it ended up being a parent genre, with Classical as a sub-genre. I can’t seem to reverse this so that “piano Misc” becomes a sub-genre of Classical.
Here is what the Roon help system tells me:
“Roon supports editing of the genre hierarchy itself. Is Tango a Top-Level genre for you? By all means, put it at the Top-Level.”
Here is the link to this:
https://kb.roonlabs.com/Editing_and_Grooming_Your_Collection
Warren