Mozart?

Thanks for the thorough reply. That's pretty much what I suspected. It sounded too modern & sultry to be Mozart. Really liked it though. I'll have to see if the piece was recorded in full separately from the scene.

Yes, the main theme is based on Mozart's "Requiem" - The Lacrimosa
https://www.youtube.com/watch?v=k1-TrAvp_xs

Back in the 1990's I owned a program for the Atari ST computer that mechanised something called "Mozart's Dice". What the program did was roll a pair of virtual dice, and dependant upon the (random) number thrown, it would generate a short piece of music that was recognisably "Mozartian". A non-mechanised version (using genuine dice!) apparently goes back to Mozart himself.

We know when W.A.Mozart was born, we know when he died, we know pretty much exactly how much music he composed in that - fairly brief - lifetime. And we know how long it takes to write down a page of music, by looking at the work of professional orchestral transcribers today. The puzzle is that if Mozart had spent 10 yours each day, seven days a week... he's have been hard pressed merely to write down all the music that we're pretty sure he composed. No time to stop and thing, or make corrections or revisions. Mozart appears to have been some kind of "idiot savant", who continuously wrote down the music that kept endlessly playing in his head. The strange thing is...playing his music quietly in the background has a measureable effect on the behaviour of disruptive schoolchildren. It calms them down, makes them LESS disruptive. And it's not "random". The music of other composers doesn't have anywhere near the same effect.