 According to Joe Harrington, the album coincided with rock 'n' roll's development into a variety of new styles, for which the Beatles remained the "conduit through which all ... ideas were filtered".Andrew Loog Oldham, the Rolling Stones' manager and producer at the time, has described "Rubber Soul" as "the album that changed the musical world we lived in then to the one we still live in today".The use of sitar on "Norwegian Wood" launched what Indian classical musician Ravi Shankar described as "the great sitar explosion", as the Indian string instrument became a popular feature in raga rock and for many pop artists seeking to add an exotic quality to their music.