Thanks for responses. I knew the song itself would not be to everyone’s tastes. No worries about that.
I also know I can conduct my own research and find the answers I’m looking for, but sometimes it’s quicker to ask the experts! What are fora for if not conversation and the passing of knowledge? But I digress. It sounds like 22-23 Hz is the answer to question number one, although not quite definitely. I’ll be googling about “REW”, “Sonic visualizer”, and “spec lab”. Those were the kinds of answers I was looking for for number two, and I appreciate the suggestions. Still hoping for more feedback from anyone interested.