ROLLA, Alessandro, violinist and composer, born at Pavia, . He first studied the pianoforte, but soon exchanged it for the violin, which he learned under Renzi and Conti. He had also a great predilection for the viola, and wrote and performed in public concertos for that instrument. For some years he was leader of the band at Parma, and it was there that Paganini was for some months his pupil. [See Paganini.] In 1802 he went to Milan as...