I am having a minor issue with the default volume control for RES vs radio. For the radio, the volume is set higher and for RES it is much lower. The problem happens when I switch to a CD/ DVD and press the listen in button, waiting for the music to start. I cant hear anything until I figure out that the volume was so low and the music was already playing. Conversely if I am switching from a CD to the radio, the volume is so loud that it startles my sleeping kids. How to make the volume equalize between all playing sources.