Pretendus

I can confirm that this issue is now fixed in iCue software version 3.33.246, as walker164 says in the previous post. I've flicked the mic up and down about 50 times to test this and the sidetone turns on and off exactly as it should do. You now get "Mic off, mic feedback off" when the microphone is up, and "Mic on, mic feedback on" when the microphone is down. Took a long time, but it's great that this is finally fixed. My Void wireless headset is now pretty much 10/10.