In this version of Mozart's German Dances, the third section of each dance has "Trio." engraved above the staff. What does this indicate?
Specifically: it has to be written for a cappella performance by a mixed soprano-alto-tenor-bass choir. It can't have a mandatory instrumental part (e.g. piano, organ, string quarter, etc.), but may ...
What distinctive stylistic elements from Mozart's works should I include in a horn solo cadenza (in Horn Concerto III, Movement I) to make it fit well with the rest of the piece? (Oppositely, is there ...