As far as I can tell, the signal coming in on the USB cannot be controlled within the X1204USB, which means I have to adjust the volume from the source (computer). Am I wrong in this?
Also, it seems that while the specifications say that the output on the USB is the same as the main channel, if I push the button which routes the USB in to the main channel, the USB out goes silent. Am I doing something wrong?
What this effectively means is that the incoming USB signal can't really be mixed.