6 Duetti a Due Viole, by Allessandro Rolla Duetto No.1. (BI 9) This work is transcribed so that the viola parts can be built separately or together as a score. Part Viola 1, rolla_6duos_1_vla1.ly Part Viola 2, rolla_6duos_1_vla2.ly Complete score, rolla_6duos_1_score.ly