I understand that the THX certification on an AVR really doesn't mean much. I have a Yamaha RX-V1400 and it has a THX button on it. My understanding of this selection is that it takes the normal Dolby Digital signal and processes it a little differently. My question is does anybody know what it does differently? Does it color the sound in some way? Does it change the way the bass management works? It does sound a little different but I just can't figure out why or how it is different.

Thanks.