Ok, I found some stuff out. If I hit the Play/Pause buton the sound comes on. In both AUX and TUNER. the weird thing is, if I change the mode, and then change back, it is muted again. Sooooo....the fix should be that you (by default) leave the sound on and pause it if we choose to.

I am still running 2.0 Beta 3 and it is the developer image on a Mark1.