Why didn you make the X-Fi Titanium I/O Drive compatible with the X-Fi Prelude?
X-Fi Titanium I/O Drive compatibility is a matter of the chipset. The X-Fi Forte and X-Fi HomeTheaterHD are native-PCI Express soundcards.The chipset within the soundcard is different than the X-Fi Prelude (the X-Fi Prelude chipset is designed for the older PCI interface which has a lower maximum throughput). The X-Fi Titanium I/O Drive works with native-PCI Express X-Fi Soundcards only—and not necessarily all such cards. Again, it depends on the chipset of the sound card.