I've been playing for 30 some years now, and have done a good bit of live performing over the years. Many times I'm handed a cable and someone else is dealing with the sound part, but I have also done quite a few shows where I'm setting up my own sound. For the most part I've clunked around with the connections and if there was sound coming out, well then there ya go. One of the main things I'm completely ignorant of is the technical aspects of different types of signals, what types of signals work well with what connections and whether I'm converting properly when needed, and usage of terms like noise floor, dynamic response, impedance mismatch, padding, and stuff like that. Basically I want to make smarter choices when it comes to trying out different routing options on my live setup, and use the specs of my equipment to help inform those decisions. I also want to be able to use this info to make smarter purchases in the future as I try to upgrade my setup. Obviously I am not looking to become an audio engineer, I have a great deal of respect for the knowledge these guys carry around, and if I could afford to pay a guy to run sound at every gig I'd be all over it. But if I can at least gain a shred of that knowledge so I am not being a complete numbskull with my gear I would be grateful. Is there a website or a book that lays it all out, kind of like what tweakheadz does for home recording? Or maybe I should just keep reading that?