Finding Copyright-Free Music:

Seeing as how copyright music is a problem when creating a film trailer, i have decided to look online for some sounds and music effects which are free for general use. Some websites i have found include: Freesound and FreeSFX.  

From here you can download sound effects which are 100% available to use, therefore copyright is not an issue. There was quite a range of eerie sound effects that would be appropriate for my film on these sites, so i think it would be a good idea to include them into my trailer.