what is this dmesg error telling me?

This system was running fine, I wasn't seeing none of this, now I am seeing this error when I boot up. Searching it I see something about sound but my sound is working fine like before this error started showing up.
Code:
hdac0: Command timeout on address 0
hdac0: Reset setting timeout
hdac0: Command timeout on address 0
hdac0: Command timeout on address 0
I don't have any idea what it is or why it is so I do not know what to look at to try and stop it from doing this.

anyone?
 
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