Question Does Correct XT attempt to correct pitch based on the chord being playing on the instrument plugged into the Correct XT
No. The Correct XT uses chromatic pitch correction for the voice, which doesn't require any pitch detection. The instrument/thru sockets are mainly there for convenience, so you don't need to bring or hook up to a DI box, since that's built into the pedal.
Keywords: Correct XT: Pitch correction and the guitar input