High Quality Content by WIKIPEDIA articles! Dr. Byrds & Mr. Hyde is the seventh album by the American rock band The Byrds and was released in March 1969 on Columbia Records (see 1969 in music). The album saw the band juxtaposing simple country rock material with harder-edged psychedelia, giving the album a stylistic split-personality that was alluded to in its title. The album was the first to feature the new band line-up of Clarence White (guitar), Gene Parsons (drums), John York (bass), and founding member Roger McGuinn (guitar).Dr. Byrds & Mr. Hyde is unique within the band`s discography for being the only album on which McGuinn sings the lead vocal on every track.