However, you can’t use just any music. You can’t select the latest pop hit without acquiring the right to use it. Since your trailer will be viewed over and over, you’ll need royalty free music.
What is royalty free? According to Wikipedia:
"Royalty-free, or RF, refers to the right to use copyrighted material or intellectual property without the need to pay royalties or license fees for each use or per volume sold, or some time period of use or sales."
Online, there are many places to find royalty free music, both free and for a fee. When selecting your music, be sure to check the following:
The license agreement
Cost of music
Cost to access music site
Length of music
Here is a list of sites that offer music for commercial use either for free or for a fee:
Free Music Archive
Free Stock Music
Vimeo Music Store
Stock Music Site
Pixel Prospector - lists a variety of other music sites
Have you created a book trailer? What other royalty free music sites have you discovered?