Frank Zappa - "Inca Roads"

Recorded August 27, 1974 at KCET in Hollywood, CA, featuring Frank Zappa (guitar, percussion, vocals), George Duke (keyboards, finger cymbals, tambourine, vocals), Napoleon Murphy Brock (tenor sax, vocals), Ruth Underwood (percussion), Tom Fowler (bass), and Chester Thompson (drums).

Frank Zappa official site