noun
mood music
Background music intended to create a particular atmosphere, often romantic or relaxing. A direct loan from English.
レストランでムードミュージックが流れていた。
Mood music was playing in the restaurant.
Variant with interpunct, sometimes used for clarity.
BGM is a broader term for any background music, while ムードミュージック specifically emphasizes creating a mood or atmosphere.
Loanword from English 'mood music'.