Discover a whole new world of multi-channel surround sound with Denon’s AVR-4310CI A/V receiver, which is among the first to include Dolby’s latest Pro Logic IIz decoder, which provides for front height channels to dramatically expand the front channels’ soundstage. The highest resolution audio decoders are provided, including Dolby TrueHD and DTS-HD Master Audio for the ultimate in audio fidelity. Audyssey's newest technology, Dynamic Surround Expansion, provides a more enveloping soundstage by deriving front height or front wide width channels for the most immersive surround sound experience. Analog and digital video sources are upconverted via Anchor Bay VRS processing to HD quality (up to 1080p/24/60), and the AVR-4310CI features no less than six HDMI inputs along with two parallel HDMI outputs. The Audyssey MultEQ XT room acoustic correction system features a supplied microphone that measures and corrects speaker/room response for up to eight measurement points, and the Dynamic Volume and Dynamic EQ systems provide rich, extended response at any volume level with no annoying volume jumps during commercials. With XM and Sirius satellite radio options, the AVR-4310CI also features built-in HD Radio for dramatically improved fidelity.