I am like a pig in clover. Now I realize what is going on I can't pull myself away from it.
Good work Bill.
Just on brightness, some music is just bright. But often, I find that where some recordings appear to have top end glare, on closer inspection can be compressed.
When you find something that appears bright, take a closer look at the track with Audacity - you might be surprised at what you see.
Then again, it could just be a bright recording. For a long time I was struggling with moments of brightness on my system. It's also a sign that something in the system may not be right (eg: aged components/caps that need replacing).