noun
Refers to the main musical theme of a film, TV show, game, or event.
この映画のテーマ音楽はとても印象的だ。
The theme music of this movie is very impressive.
主題歌 is a theme song with vocals, while テーマ音楽 is instrumental theme music.
Compound of テーマ (theme) from German 'Thema' and 音楽 (music).