The Byrds' March 1966 single "Eight Miles High" and its B-side, "Why", were also influential in originating the subgenre. Whereas earlier recordings by the Kinks, the Yardbirds and the Beatles had used Indian sounds to complement standard song forms, the Byrds incorporated the improvisational technique typical of Shankar's work and of John Coltrane's jazz interpretations of ragas. In his 1968 "Pop Chronicles" interview, however, Byrds member Roger McGuinn denied that "Eight Miles High" was raga rock; co-writer David Crosby also dismissed the term. While many listeners assumed that the lead instrument on these and other songs on the Byrds' "Fifth Dimension" album was a sitar, McGuinn played a Rickenbacker 12-string electric guitar throughout, and had customised his guitar amplifier to achieve the sitar-like sound.