Sound very distorted on CURRENT

[Malcolm Matalka]

Andrea Venturoli <ml at netfence.it> writes:

> On 11/5/20 2:01 PM, Malcolm Matalka wrote:
>> I'm on revisions 367338 and now my sound is super distorted.  I'm on a
>> Dell XPS.
>> Is anyone else experiencing this?
>> Nov  5 06:34:50 bsdell kernel: pcm0: <Realtek ALC299 (Analog)> at nid 23 and
>> 18 on hdaa0
>> Nov  5 06:34:50 bsdell kernel: pcm1: <Realtek ALC299 (Right Analog Headphones)> at nid 33 on hdaa0
>> Nov  5 06:34:50 bsdell kernel: pcm2: <Intel Kaby Lake (HDMI/DP 8ch)> at nid 3 on hdaa1
>
> Maybe it's something like what I reported here?
> https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=244093
>
> Everything worked perfectly on 11.3.
> Upgrading to 12.1 introduced the issue.
> This got better after I shuffled the PCI cards.
> At least of all the output I have I was able to fix those that I use.
>
> Can you in some way try to reassing the IRQs in a different way?
>
>  bye
> 	av.

After playing around a bit, I found updating the following sysctl fixed
it.  I had set it very low before because my speakers were not loud
enough, but some change seems to have made them loud enough so I can set
this higher.

hw.snd.vpc_0db=60