The recording of the album was divided between sessions in Nashville and Los Angeles, with contributions from several notable session musicians, including Lloyd Green, John Hartford, JayDee Maness, and Clarence White. However, steered by the passion of the little-known Parsons, who had only joined the Byrds in February 1968, this proposed concept was abandoned early on and the album instead became purely a country record. The album was initially conceived as a musical history of 20th century American popular music, encompassing examples of country music, jazz and rhythm and blues, among other genres. Thus, the album can be seen as an important chapter in Parsons' personal and musical crusade to make country music fashionable for a young audience. The album was also responsible for bringing Parsons, who had joined the Byrds prior to the recording of the album, to the attention of a mainstream rock audience for the first time. The Byrds had occasionally experimented with country music on their four previous albums, but Sweetheart of the Rodeo represented their fullest immersion into the genre thus far. Recorded with the addition of country rock pioneer Gram Parsons, it became the first major album widely recognised as country rock, and represented a stylistic move away from the psychedelic rock of the band's previous LP, The Notorious Byrd Brothers. Sweetheart of the Rodeo is the sixth album by American rock band the Byrds and was released in August 1968 on Columbia Records.