Enjoy 7.1 channels of incredible surround sound, connect up to seven HD sources and listen to music from your iPod® or iPhone® via the included dock with the STR-DH820 A/V receiver. Improve the quality of connected video sources to near HD quality or experience incredible sound quality while you watch 3D sports, movies and games from connected 3D devices. This receiver also has LPCM, Dolby® trueHD, ProLogic IIz and dts®-HD decoding technologies for audio that is true to the original master recording. An easy-to-use menu provides simple operation while convenient audio calibration set-up assures the best possible listening experience. Additional features include Audio Return Channel which eliminates the need for extra cables connected to your TV, and standby pass-through that lets you access all of your HDMI™ connected devices without having to power on the receiver.