I like to turn down combat music because i find it distracting when i am in combat, but i leave radio volume up because i like listening to radio shows.

Volume control works in the sense that music volume will be adjusted, however anytime a radio show has a commentator speaking, the volume is controlled by the music volume and not the radio volume, resulting in me having to turn up music volume in order to hear the news shows on the radio. This appears to be a bug.