Currently Being ModeratedNov 10, 2012 12:46 AM (in response to Arsenic Trioxide)
Wow. Just assign Logic to any available output of the onboard Mac audio or, better, a dedicated audio interface and then connect a physical cable from this output to any of the VSX-822 inputs. It appears to have enough of those.
I don't know what the USB connection is for, but if it has a built in audio interface via USB these outputs should show up in Audio MIDI Setup, meaning you can select these directly as the outputs for Logic in Logic Pro>Preferences>Audio>Devices>Coreaudio. However, my experience with these type of ports is that they're only there to hook up mass storage devices (e.g. external HD)