FM radio seems to be at the end of its life, or in its “golden years” certainly. Supplanted by Pandora and Spotify, Amazon Music, Radio Paradise, and all the rest, but in the late 1960s it was just coming into its own with progressive rock, and album-oriented rock.
And so we have “FM” by Steely Dan. It was the theme of the 1978 movie FM. (It didn’t do well at the box office and remains “obscure.”) It was recorded at the same time they were recording Aja, but it was not included in that album.