I know it's slightly different, but I've purchased several professional drum loops on CD's for use with samplers, etc. The license agreement states that they cannot be resold in any shape or form as loops on a new sample CD, but can be used freely within commercial compositions, as long as they are altered in some way and are combined with other sounds/instruments (i.e. are not used solely in a track and unchanged).

Doesn't really relate to styles I guess.... It does say that no matter what, the audio loops remain the property of the creator. However, if you change them in some way (i.e. with effects, reverse order, etc), put them into a song with other loops/sounds, you're free to sell that song commercially.

Weird.