I have a 2012 Ford Focus SE with a factory radio system and the radio volume inconsistent when going from AM to FM to AUX to USB. To have a decent listen volume on AM I have the volume at lets say 7, when I change to FM it has to be down to 2. Is there any way to get the volumes consistent across sources? I would like to be able to change from AM to FM without a big spike up in volume, it is just too loud when switching. It would make since that there is a way to equalize the volume however a I have been unable to find an adjustment in the manual, forums or searching the menus.