the trios can have very varied instrumental combinations, although the most widespread are:
Trio of string: violin, viola, cello.
Trio with piano: violin, cello, piano.
Trio of clarinet, violin and piano: clarinet, violin, piano.
Trio of clarinet, viola and piano: clarinet, viola, piano.
Clarinet, violoncello and piano trio: clarinet, cello, piano.
