 In 1975, Oldfield received a Grammy award for Best Instrumental Composition in "Tubular Bells – Theme from "The Exorcist"".In 1976, Oldfield and his sister joined his friend and band member Pekka Pohjola to play on his album "Mathematician's Air Display", which was released in 1977.The album was recorded and edited at Oldfield's Througham Slad Manor in Gloucestershire by Oldfield and Paul Lindsay.