I had a similar problem: the audio started creaking when the computer was on heavy load and wouldn't stop until the pipewire service was restarted. I was using linux-zen kernel and I read that this was a known issue of linux 6.4, if I remember well. Using linux-lts solved the problem. Hope this helps!
this post was submitted on 22 Sep 2023
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Update: Moving form Zen to regular 6.5.4 kernel greatly reduced the number and intensity of crackles. Unfortunatly, moving from regular to 6.1 lts remained with the same reduced crackles.
That might actually be related, because I'm also using the zen-kernel.
I'll try with the regular and lts ones and report back.
Thanks!