I know a-bus is kind of basic when compared to some of the other systems out there. ZON is a great system but no video dist.
The ability to do dist 6 sources of Audio and video on a budget is great.
On talk back counting and bass and treble adjusting.....I really do not want my customers to know how to adjust Bass and treble....I make the rooms sound good and match each other, a customer throws it out of whack with bass and treble adjustments which leads to a "all of a sudden" the kitchen sounds terrible....I think the speaker went bad, can't be my fault, come fix it under warranty.
I'm Not an engineer, but I play one on TV. My handle is Tweety but I have nothing to do with the organization of similar name. I just had a really big head as a child so folks called me tweety bird.