When building audio circuits, I have often used a single-supply non-inverting configuration in which the feedback resistors are connected to via 10uF electrolytic capacitor to ground instead of directly to ground. I found this circuit online once, but don't generally see it when looking up single-supply circuits.
How does this circuit work? And how does the output end up more or less in the middle of the output range of the opamp (0v -> 9v in my particular case).
EDIT: The reply that states that this doesn't work isn't quite correct - since it does :). However I did omit to mention that the input is not referenced to ground but instead somewhere around 5v or so. It's not half-supply though, since it came out of a class-A FET input stage and ultimately from an electric guitar input.
Anyway, the answer that you get a DC gain of 1, and an AC gain of 10 is the one I was looking for. I'd like to understand more about this though. Is it that at DC the capacitor is effectively an open circuit, and so the op amp becomes a voltage follower? And at AC it is a resistor of some frequency-dependant size, and thus it becomes an amplifier of some gain?