Yamaha RX-V573 7.1-Channel Network AV Receiver (Discontinued by Manufacturer) 7-channel powerful surround supported in HD Audio format decoding: Dolby TrueHD and DTS-HD Master Audio; Dolby Digital Plus and DTS-HD High Resolution Audio Network recceiver with AirPlay, allows music streaming from Mac, PC, iPod, iPhone, iPad 4K pass-through for next generation super high resolution displays, and HDMI (4 in/1 out) with 3D and Audio Return Channel AV Controller app for operating various functions from an iPod, iPhone, iPad or Android phones YPAO sound optimization for automatic speaker setup