Sound effects
Here is a list of sites which contain either copyright free music or sound effects.
It's always useful to be able to find something quickly when you are in the middle of an edit and need that special sound effect or an extra piece of music which doesn't need royalties paying on it.
Sound-effects-library
Sounddogs
Hollywoodedge
Sound-ideas
Garritan
Soundsonline
Findsounds
Freeplaymusic
Yopo
Archival Preservation of Player Piano Music Rolls
