Volume normalisation between radio and media?

When I'm listening to the radio, I have the volume turned to a comfortable level... Excellent, all is fine so far.



I then decide to watch a DVD or play some music from my Android. The volume is at only audible for cats. I have to turn it so far up it's ridiculous.



Then I switch back to radio, and I get my head blasted off.



Both use the "Entertainment" volume setting, but there seems to be no normalisation between the two inputs.



Does anyone know how to fix this?