Indian music was another touchstone on "Sgt. Pepper", principally for Lennon and Harrison. In a 1967 interview, Harrison said that the Beatles' ongoing success had encouraged them to continue developing musically and that, given their standing, "We can do things that please us without conforming to the standard pop idea. We are not only involved in pop music, but all music." McCartney envisioned the Beatles' alter egos being able to "do a bit of B.B. King, a bit of Stockhausen, a bit of Albert Ayler, a bit of Ravi Shankar, a bit of "Pet Sounds", a bit of the Doors". He saw the group as "pushing frontiers" similar to other composers of the time, even though the Beatles did not "necessarily like what, say, Berio was doing".