Interviewmode leverages Audience's industry leading stationary noise reduction technology to capture both voices with crystal clear accuracy while still suppressing background noise.
Audio Zoom allows users to dynamically switch between narrate mode, with a single speaker, to interviewmode, where the person holding the device can "interview" another person.
Be sure to check out my interview with Dark Souls 2 director Yui Tanimura for more information about the game, Easy Mode, and the reason he thinks the first game was such a big success.