Hello,
1. I get no HDMI audio device.
2. OS X 10.10.4 / Sabertooth Z77 / 3570k / EVGA GTX 970 SSC
3. 1st attempt at clover/yosemite, with HD4000, didn't have Audio Devices, was able to enable audio devices by using "audio_cloverALC-110.command, and no HDMI audio. Then I got a EVGA GTX 970 SSC, reformated and installed 970, disabled HD4000 and made a new DSDT following via MaciASL (Pjalm) asus mobo only + (toleda's HDMI audio) nvidia A1. Since i've installed the GTX 970 and reformated, i haven't run the audio_cloverALC-110.command, but i still see the AppleHDA KextToPatch on config.
4. I have attached req. troubleshooting files. Note: Attached S/L/E AppleHDA.kext "should" be native. (???) Under DPCIManager i see the ALC892 codec.
Thank you.