[GSoC'21 Weekly Update #9] Sound mixer improvements

Hello,

The past week my country, Greece, has been -- and is still being --
devastated by wildfires. Some of them were outside my home town, so
I've been volunteering to put the fires out and also help the
firefighters, as well as refugees from the destroyed towns. The only
thing I've managed to do was to finalize and get my new sysctl
pushed to upstream and get the userspace code up for a final review.

--
Christos