 In addition, a rift was growing between McCartney and his bandmates as he continued to abstain from trying the hallucinogenic drug LSD.The revelations provided by the drug had drawn Lennon and Harrison closer, and were then shared by Starr when, during the band's stay in Los Angeles that August, he had agreed to try LSD for the first time.Author Andrew Grant Jackson describes "Rubber Soul" as a "synthesis of folk, rock, soul, baroque, proto-psychedelia, and the sitar".