Chromophone Band

"Chromophone Band" was the title given to a piece of music written on a human colony conquered by the Macra. It was a cheery tune, played when the Second Doctor, Jamie McCrimmon, Ben Jackson and Polly Wright arrived. It was played again after the Macra were defeated. (TV: The Macra Terror)

Behind the scenes
In reality, it is Delia Derbyshire, the woman behind the original recording and arrangement of the Doctor Who theme, who composed "Chromophone Band", for the BBC's stock music library.