American mandolinist David Grisman combines bluegrass, folk, and jazz in a genre he calls Dawg Music. In the sixties belonged to the Even Dozen Jug Band with Maria Muldaur and John Sebastian and then in the psychedelic rock band Earth Opera. When he moved to San Francisco, he met Jerry Garcia and appeared on the Grateful Dead album ‘American Beauty’ and played in Garcia’s bluegrass band Old & In