I am having issues with getting my Helix to work with my RC-300 loopstation. I am running 2 paths where one is for guitar and one for microphone. I am sending out both to the RC-300 and the RC-300 is going to my PA (Bose compact). I have issues with the gain of the mic and if my guitar is not at a volume of 10, it is really quiet. I am not sure if I am routing the 2 devices the most efficient way. I would prefer to use the Helix to send the signal to my PA. What can I do to correct this?