So I mainly like to stream the M1 slingbox to my windows HTPC. When I do this I've been noticing that my volume fluctuates up and down. It goes so low I can barely hear anything then it will shoot back up and be very loud. It makes it impossible to follow along with what I am watching. When I switch over to streaming to my Roku stick I have no issues with the audio, so I know it's not the cable box.