To answer the first question, which
@beep already did, you need a virgin unaltered AppleHDA and no patches. Secondly, in clover configurator, try audio device id 1 or 11.
Have you got some kind of speaker (or headphones) plugged into your green rear audio output? Or any of the other audio outputs on the rear of your motherboard? Finally, make sure you have changed the audio output in system preferences -> sound. On my system, I have speakers built-in to my display, so the setting internal speakers work there. I also have some old usb speakers plugged into the black rear audio port (which shows up as one of the line out ports in sys prefs -> sound). For me, both work (I have them combined as a multi aduio output device, which gives me somewhat better sound - not essential by any means).
I think it would be best to test with some kind of speakers connected to the one of the rear audio ports to make sure you are getting audio. I don't use HDMI output because I prefer to be able to control the volume via task bar, but I have to believe that you can get HDMI working once you know that you have audio from one of the rear audio ports (for me, both the green port and the black port work).
Finallly, check the Apple MIDI tool to make sure your default audio assignments match what you expect them to be (in my case, normally, it's the multi output device, which includes both the internal speakers from my monitor and the usb powered speakers which are connected to one of the line out ports).
In the attachment below, I have simplified my setup temporarily to demonstrate to you how this should work. You can see that I have specifically designated the "line out" port for use in my system and I have my usb speakers plugged into the black port on the rear of my motherboard. The Apple MIDI tool shows that line out port as my default.
And, if you need more support, I would recommend the insanely mac group. I've found them to be very responsive.
