I tried to route the audio of my pc through USB to out 2 of FM3, which is connected to active speakers but no way to make it work, even setting Out 2 to replicate Out 1 the sound coming from usb cable always goes to Out 1 only. Am I doing something wrong or is this a design limitation or choice? whatever software I use on pc or Mac setting audio out to fm3 speaker goes to Out 1.....