第33张录音室专辑 Underground Chamber is the thirty-third studio album by guitarist Buckethead. It is the fourth album in the "Buckethead Pikes" series. The album was released alongside two others, the first being 3 Foot Clearance (the reissue of the 2010 Untitled album), and the other being Look Up There. The album consists of one unbroken track. According to the Buckethead Pikes website: “ It is the documentation of the discovery and the exploration of the underground section of Bucketheadland".