 Spector made various changes to the songs, but his most dramatic embellishments occurred on 1 April 1970, the last ever Beatles recording session, when he added orchestral overdubs to "The Long and Winding Road," "Across the Universe" and "I Me Mine" at Abbey Road Studios. The only member of the Beatles present was Starr, who played drums with the session musicians to create Spector's characteristic "Wall of Sound." Already known for his eccentric behaviour in the studio, Spector was in a peculiar mood that day, as balance engineer Peter Bown recalled: "He wanted tape echo on everything, he had to take a different pill every half hour and had his bodyguard with him constantly. He was on the point of throwing a wobbly, saying' I want to hear this, I want to hear that. I must have this, I must have that. '" Bown and the orchestra eventually became so annoyed by Spector's behaviour that the orchestra refused to play any further, and at one point, Bown left for home, forcing Spector to telephone him and persuade him into coming back after Starr had told Spector to calm down.
