Spirit was a highly regarded rock band that achieved modest commercial success, charting 11 albums in the U.S. between 1968 and 1977. Founded in Los Angeles in 1967 by musicians who had a mixture of rock, pop, folk, blues, classical, and jazz backgrounds, and who ranged in age from 16 to 44, the group had an eclectic musical style in keeping with the early days of progressive rock; they were as likely to play a folk ballad featuring fingerpicked acoustic guitar, a jazz instrumental full of imaginative improvisation, or a driving rhythm tune dominated by acid rock electric guitar playing.