music for films/instructions?

I had a questions regarding using music in my instructional series. Is there a site for royalty free music? What do you all do for music in your films or instructionals? Thank you in advance.

Just google royalty free music and you'll get tons of sites.

Grapple god- www.dryver.net

Our music is perfect for these kind of videos.

I've used this site many times.... http://www.licensemusic.com/

ttt