Ken Kesey's Ultra Rare 1966 studio recording of the Acid Test w/ The Grateful Dead. Legendary documentation of the 1965-66 Bay Area Acid Test scene from 14 hours of the actual trip (recorded in a studio). Lots of amazing mind games and word play with Ken Kesey and Ken Babbs in good form. Ad libbed poetry, fractured harmonica solos, tape loops and the Grateful Dead lurking in the background. Released in March 1966.