Help with audio

hey i have the newer alpha with the m38100y cpu. I have catalina installed 10.15.4 and am trying to set up my audio properly and enable the boot chime. Currently i am using the fake intel pcii kext or w.e its called and have audio through hdmi but not adjustable. What i am trying to figure out.

  1. How to make it adjustable? Do I need the fake pcii kext or just the apple alc?
  2. As of right now when i boot up it defgaults to headphones not hdmi how do i switch this?
  3. what do i need for audiocodec and audioout to have the boot chime working?

Thanks

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