Thanks so much for this. Have a Creative Soundblaster X-fi (SB0880) but failed over and over to get it working. Can't get internal audio to work either (IDT 92HD68E2). Was happy to settle for HDMI audio through Nvidia GTX660 card as don't need any more than stereo outside of Windows. Followed instruction to remove the VoodooHDA kext from extensions folder and installed your kext with KextBeast. Worked straight after a reboot.