Score and Parts-Score and Parts for Saxophone Ensemble. Trio Sonata is written for: Keyboard Solo (any type) GS82605 ˇ String Trio (Violin/Viola/Cello) GS82374 ˇ Double Reed Trio (Oboe/English Horn/Bassoon) GS82451 ˇ Clarinet Trio(Clarinet/Clarinet/Bass Clarinet) GS82450 ˇ Saxophone Trio (Soprano/Alto/Bari) GS82452. Mr. Harbison suggests performers try mixed configurations (e.g. Violin/English Horn/Bass Clarinet).