Had the same issues on 2 machines as well.
Using a Xenyx 302 USB and had sudden periodic popping noise on the right side of my headphones.
Thanks to comment [#11](https://bugs.launchpad.net/ubuntu/+source/linux-signed-hwe-5.13/+bug/1966066/comments/11) it is fixed for now.
You can also restart with an older Kernel, that is what I did on my desktop.
Had the same issues on 2 machines as well.
Using a Xenyx 302 USB and had sudden periodic popping noise on the right side of my headphones.
Thanks to comment [#11](https:/ /bugs.launchpad .net/ubuntu/ +source/ linux-signed- hwe-5.13/ +bug/1966066/ comments/ 11) it is fixed for now.
You can also restart with an older Kernel, that is what I did on my desktop.