Using Background or Soundtrack Music in Films - Jurisprudential Answers - Miscellaneous Issues, Vol 1

Ahmed al-Hasan Response:

If the music is the music of songs or similar material, it is not permissible to use it. But if it is background music used to indicate that a scene is sad, tense, frightening, and so on, it is permissible. In other words, it is permissible to use it as a film soundtrack.