Purple Planet Music is a terrific website to visit to find the soundtrack that's right for you. All of Purple Planet's music is royalty free. Their music covers genres including the following: dark, dance, upbeat, cool, relaxing, reflective, sneaky, creepy, rock, retro, jazz, drama, international, mystery, horror, and other musical types. Dozens of their soundtracks are 100% FREE and easily downloadable as .mp4 files. I have downloaded numerous PP tunes that are free of charge and used many of them in my videos. But they also have a number of royalty free tracks which have to be paid for. Check out the site here: http://www.purple-planet.com/home/4593438321.