We all know our Mavics don't record sound. I picked up a small Zoom H1 to record ambient sound when I want it in the video, but I also like to add music. In the past, I've used YouTube's audio library, my own mp3's, and sites like bensound.com, but i'd like to see what other options are out there. Where do you find music for your videos? (Royalty-free preferred). Thanks!