Real Wavs??

I was wondering if the wavs that are created by this program are real wavs? I have some wavs I have downloaded, and even though they play in some programs, when I use Adobe Premiere,they are not recognizeds as wavs, and can not be used. Is there a difference in the conversion that makes them "different" from regular wavs? I am looking for something that will let me make the wavs and then USE them also, not just listen to them.
Sandi