This is an OLD post. Now all horror background music tracks available here.
This is next addition to my, free horror sound library. While creating this little collection, I have used synthetic sounds generated by Thor synthesizer of Propellerhead Reason. As a result, sound samples are most threatening and harsh. If you find that the higher frequencies in the audio samples are redundant, use a parametric equalizer. Although most of these sound samples are short phrases intended to cause consternation, surprise and fear, there are also some longer samples, allowing gradually escalate the horror. Apart from the fact that these samples can be used as background music for movie of horror, you can use them in any way, including ring tones, remixing, and more.