Sonicfire Pro comes with an extensive library of audio and music tracks, which is updated monthly with content adjusted to suite your needs. Also, if you like, you can go pro with Sonicfire Pro, and get a license to use the tracks throughout your montages.
If, however, you are only looking for a training tool, Sonicfire Pro proves to be ideal. You can, for example, spruce up videos you make with your friends with music and sound effects.
You need to install Quicktime to make the program work correctly.
30 day trial version.