Just pre-ordered and installing the beta as we speak. Will definitely check out the sound issue you speak of.
While waiting for my download to finish I'm checking the first Youtube stream of the Fleet Battles. I see that you can no longer fly past the edge of one side of the screen and come out of the opposite. This is good. I always found that feature in the old games a bit confusing.
I also see the asteroids close in on the planet as the match goes on. I'm not so sure about that. I used to chip away at an Ur-Quan Dreadnought's health using my Shofixti Scout even if it took forever. I guess that strategy will no longer work here.
My god, I am getting really pumped. So excited to try this out.