Task: Question Answering
Input (English): Passage: In early 1970, Lennon and the Beatles' manager, Allen Klein, turned over the recordings to American producer Phil Spector with the hope of salvaging an album, which was then titled Let It Be. McCartney had become estranged from his bandmates at this time, due to his opposition to Klein's appointment as manager. Several weeks were lost before McCartney replied to messages requesting his approval for Spector to begin working on the recordings. Spector chose to return to the same 26 January recording of "The Long and Winding Road".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". Already known for his eccentric behaviour in the studio, Spector was in a peculiar mood that day, according to balance engineer Peter Bown: "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.'" The orchestra became so annoyed by Spector's behaviour that the musicians refused to play any further; at one point, Bown left for home, forcing Spector to telephone him and persuade him to come back after Starr had told Spector to calm down.Spector succeeded in overdubbing "The Long and Winding Road", using eight violins, four violas, four cellos, three trumpets, three trombones, two guitars, and a choir of 14 women, which makes 38 musicians altogther. The orchestra was scored and conducted by Richard Hewson, a young London arranger who had worked with Apple artists Mary Hopkin and James Taylor. This lush orchestral treatment was in direct contrast to the Beatles' stated intentions for a "real" recording when they began work on Get Back.On 2 April, Spector sent each of the Beatles an acetate of the completed album with a note saying: "If there is anything you'd like done to the album, let me know and I'll be glad to help ... If you wish, please call me about anything regarding the album tonight." All four of the band members sent him their approval by telegram. 
Question: What is the full name of the person that made dramatic embellishments on 1 April 1970?
Output (English): Phil Spector.