[Van]

Gustav Mahler has got some creepy music, in his Repertoire. Carl Orffs Carmina Burana has some spooky tracks on it. Just don't use O' Fortuna, as everyone over uses it and it's become too recognizable. Rimzi-Korsakov A Night on Bare Mountain, is another piece that has a lot of eerie movements in it. If you can cut and paste chunks you might be able to get around some of the more familiar phrases of the piece. try a random search for Therimin music too. The Therimin in the spooky B-movie warbly whistle-ly thing.