is there any way to control the volume of the voice together with the music?

When I change the volume of the music, the navigation voice stays at the same volume, so it is unhearable. I know I can change the voice volume in the menu but is there a way to control them both with the volume knob?

any hacks?

sorry, there is no way of changing the voice volume with the control knob. Have to go through the menu

that is too bad, maybe some hackers can control the master volume output one day.... hope so.