The Ear Force DSS 7.1 channel Dolby surround sound processor transforms any stereo headset into full, immersive surround sound for playing Xbox 360, PlayStation 3 or PC games and watching movies with Blu-ray or DVD players. It works with any set of stereo headphones and is the perfect complement to the Turtle Beach Ear Force series of stereo gaming headsets (X31, X11, XLC, Z1, Z2 and PX21). The optical digital input easily connects to a game console or media player for Dolby 7.1 channel surround sound and the analog input can also be used to upgrade analog stereo audio sources to Dolby Pro Logic IIx for virtual surround sound. A bass boost control adds sub-woofer effects for enhanced realism to any audio source.With the Ear Force DSS, video game and movie fans will be able to hear distinct audio events happening all around them, greatly enhancing the overall experience and rewarding gamers with a newfound competitive edge. DSS users playing games and watching movies on their game consoles will actually hear the 7.1 surround sound from certain 5.1 channel audio tracks via additional “hidden” channels called Dolby EX.