HELP D=!

[acef]

In the intro to the tutorial misson theres a nice little piece of music. Where does it come from? I am fairly sure its from a movie (perhaps a game but i doubt that) and ive been trying for 2 days to find out what movie, without success...


Please, help me sleep by answering from where the song comes from, before I go mad.

[haloguy48]

i think it is in the credits, 'opera house' its called. its like the 2nd in the credits

[beavis23]

i checked the credits and could not find this. do you know what artist / site it is available at?