Thinking about it further, I have a few other observations:
-There were still hum bars when I unplugged the laptop from power
while still connected to the board.
-The laptop was plugged into booth circuit
2, while the sound equipment is plugged into booth circuit 1, and the amps/processers are plugged into another circuit from the same panel.
is plugged into a circuit coming from a different panel.
I don't know if any of that may or may not matter, but I figure all the information I can come up with could possibly help.
Just instinctually, I feel that simply isolating the sound feed would solve matters, seeing as that is the connection that is screwing things up. Of course, there is a good chance that I could be completely wrong on this. I'm hesitant to make any major investments, as we have yet to purchase
the computer that will live in the booth and are still using my macbook for the time being.