What instruments were used in mash theme song?
Different versions exist for the Doctor Who theme song, although the basic melody remained the same. The original (1963), as well as many later versions through 1980 that used the original recordings, were electronic music made with primitive sampling methods and oscillators. After season 17, synthesisers were used. You can read more about the history of the theme song in the Wikipedia aritcle, "Doctor Who theme music".