Last night Michael and I watched Hangover Square. The real star of this film (which is a film about music) is the music, particularly this exquisite Piano Concerto.
Here's one spectacular scene:
and the trailer:
And you can actually watch the whole movie for free (and right now) on Hulu! The final scene (from about 01:06) is simply mind blowing. There is one moment when the music, which is clearly in the foreground, begins to illustrate the action, thus keeping one foot in the foreground and another in the background.