Agent256: Hello,
Just want to bump this topic, for having the same issue.
Unfortunately i cant find any kind of response in this or the official sins forum, that this bug is either well known or that it is something somebody is looking into.
It seems though that the bug only affects autocannons and lasers, as stated in this post: forums.sinsofasolarempire.com/474138/page/1/#3609478
Also i would like to know if it is a common problem with the release or an individual, system specific bug.
I'm afraid the sound issue is affecting all weapon types.
One of the Devs at Ironclad has responded that they are looking into it, so a fix should be coming at some point. Hopefully sooner than later, because this is a pretty awesome patch otherwise.