Baroque composer played role, notes studios (8,5)

'studios' is the definition.
I know nothing about this answer so I cannot tell whether it can be defined by this definition.

'baroque composer played role notes' is the wordplay.
I cannot really understand how this works, but
'composer' could be 'bach' (Johann Sebastian Bach) and 'bach' is located in the answer.
an anagram of 'role' is 'elor' which is located in the answer.
'notes' could be 'flats' (flat is a type of musical note) and 'flats' is found in the answer.
This accounts for all the letters.
This explanation may well be incorrect...

Can you help me to learn more?