Thanks. I'm buying the book by Paul White. I'm hoping that it doesn't matter whether the system is analogue or digital, it's putting out sound waves, and I can learn about sound. If not, then not.

That's troubling about the Springsteen concert. It's too bad when someone can impose for several miles. Maybe i'm being too hard on our callers. Maybe they and the dancers have hearing damage from music like that, and they do need amplification to hear each other.

My uncle's organ used to play the TV from next door.