From Longman Dictionary of Contemporary Englishmood musicˈmood ˌmusic noun [uncountable] APMmusic that is supposed to make you have particular feelings, especially romantic ones
Examples from the Corpus
mood music• But it's mood music, really - that's how I see the band.• Certainly, the mood music of summitry was transformed by the end of the Cold War.• Start with the mood music, where Maastricht sets a tone but not much more. 