Well everything was working perfectly until 2 weeks ago .. Fraps is making buzzing sounds in pretty much every video ,i tried absolutely everything lowering my mic boost , recording volume (but that only decrease my volume ,and it doesn't remove the buzzing ,changed speaker setting and all that revolves around speaker settings ,but nothing helps ,when i record my voice in audacity it turns out beautiful (i cant find a cause ) and about bandicam ,well my setting are primary device win7 sound (to record game sound ) and Logitech Mic is my secondary device ,and Bandicam for some reason records only win7 Sound ( game sound ) . I tried alternating primary and secondary devices to go like this : Primary : Logitech Mic ,Secondary : Win7 Sound , and in this case BC only records my mic ... A couple of months ago everything was fine with this software to ,i don't see the problem ,and one more thing when BC records my mic ,mic doesn't buzz or anything it's crystal clear but yet i have no game sound so it's worthless 
