[BC] Balancing processing from analog to digital

[Jim Tonne]

> How soon before radios have a "balance" control to set the relative 
> output of the analog and HD1 channels?
> The L-R and Front-Back controls have been around for years.

Excellent!  Wish I would have thought of that.  What would then
remain is to have an average volume level for each mode that is
*consistent* in itself without regard for the other mode.  Seems
doable to me.

- JimT