We were wonding/pondering that as well Sat.
For the first time, we saw the completed building and it's layout, which doesn't seem very friendly to hear.
It looks like the "outdoor" part will open towards Heinz field. The band can be set up behind the big doors and only speakers projecting toward the stadium.
With the grass hill being pretty high above the water, I am going to guess it will be very difficult to hear. But no personal experience.
2004 Supra Launch 22 SSV
Indmar 5.7 L 320 HP