This is really a beautiful mock, very well done! I am impressed at how much thought you put into this.
I have a tiny suggestion about your proposal for Business Live: the big square's duration might be a bit too long at the start, it takes space; so I thought, why not making it appear at each of the first two beeps, each time followed by a fade-out; and then at the third beep the square displays but stays on while the text "Business Live" appears.
…granted that's difficult to describe, so here's how I imagine my suggestion
It's nothing more than a suggestion on a detail, really! The whole thing is beautiful!