The album was recorded during the first week of February 1967 at Sierra Sound Laboratories, Berkeley, California, by Robert DeSouza, with production by Samuel Charters. It was released on May 11, 1967, on the Vanguard label. One of the most important and enduring documents of the psychedelic era, the cover itself is the perfect embodiment of the times. Tracks from the LP, especially "Section 43", "Grace", and "Not So Sweet Martha Lorraine" were played on progressive FM rock stations like KSAN and KMPX in San Francisco, often back-to-back. A version of the song "Love" was performed at the 1969 Woodstock Festival. And it was commercial making #39 on the charts in USA. One of those records that everyone should have.