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, "Chromophone Band" was composed by long-time Doctor Who incidental music composer Dudley Simpson, and realised by Delia Derbyshire, the woman behind the original recording and arrangement of the Doctor Who theme, for the BBC's stock music library.