A few users have reported this issue... I am yet to figure out why this is happening.. can you (and perhaps other users with the same issue) post the Motherboard or Soundcard model that you're using ? There's nothing in RR to mess with the mixer at startup.. I have never seen that happening (so I can't really de-bug it)... in any case you should be able to make a mixer preset to load at startup to take care of that.. I will double check the code..