 Spector made various changes to the songs.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".