First question is about connecting the signal inputs. If you look at pin 7 and 13 and 8 and 15 you see they are connected. I would read this to mean that the input voltages are combined with the supply voltages. This seems unusual. Am I reading it right? Where do I connect the actual audio inputs in this diagram? At the black dots above the pin 7 and below pin 8? Not super clear to me. If I'm not planning on using the mute or standby can I leave that part of the circuit out? The squiggly circle on the left of the diagram - what is it? TDA7294 Datasheet Thanks.