It's not any easy system to quickly tweak - between sources, production and rip quality etc, hence we all put up with less than perfect sound most of the time. I saw some recommended settings on a german forum, great if you listen to scooter every day, but alas.
I'd love a mechanical set of faders on the dash. With a button on the end for ESC, and quick selection of driving modes, and mirror dip on/off.