A versatile guitarist and onetime head of the guitar department at the University of Bridgeport, Sal Salvador was a capable soloist and accompanist whose single-string style, shaped by his early interest in the music of Charlie Christian, was augmented by extensive studies of guitar technique. Salvador's years of research, playing, and analysis eventually led to his writing guitar methodology books, among them Sal Salvador's Chord Method for Guitar and Sal Salvador's Single String Studies for Guitar in the '50s and '60s. He became interested in jazz during his teens, and began...