Hi,
I am still having this problem. Something strange happened, once with OSS the noise disappeared and the quality of the sound was perfect. I don't know why and i did not manage to reproduce it!
I also tried to install alsa, but i can't uninstall OSS. When I mark OSS for deletion on apps audit, it says that OSS cannot be deleted. Do you know why?
I also noticed that I get some errors at boot. Is there a log somewhere? Apparently I am mising ali15x3, can this be the cause?
Thanks