From the Wikipedia:
Drama is the tenth studio album by the English rock band Yes, released on 18 August 1980 by Atlantic Records. It is their only album to feature Trevor Horn as lead vocalist, following the departure of Jon Anderson and Rick Wakeman in March 1980 after unsuccessful recording sessions for a new album in Parisand London. Horn was joined by keyboardist Geoffrey Downes, his partner in the new wave band The Buggles. Drama was recorded in a short amount of time as a tour was already booked prior to the change in personnel. It marked a departure in the band's musical direction with songs more accessible and aggressive that featured the use of modern keyboards and a vocoder.