background music
Noun
Meaning
Any music played in a public space whose main function is to create an atmosphere suitable to a specific occasion, rather than to be listened to.
Any music in a film, video game, or other medium that establishes mood and is not meant to have the audience's focus.
Source: en.wiktionary.orgSynonyms
Examples
We are increasingly likely to find ourselves in places with background music. No composers have thought to write for these modern spaces, which represent 30% of our musical experience.
The conception of background music is changing. You use less and less of it these days.
The Mekons were kind of like the background music of my life.
Surely words are just the background music when passion pounces on a soul.
The countdown reached ten seconds and I could almost hear an invisible crescendo of stirring background music. 'Anchors aweigh!' Five, four, three, two, one... and we had ignition!
It was at that exact moment that I saw Peter walking down the hall toward me. He looked so good. He deserved his own background music.