The Turtle Beach Audio Advantage Roadie packs an amazing array of features into an incredibly small package. From digital recoding and playback to built-in amplifiers for multi-channel headsets, this is the one USB audio device that's a must have for musicians, DJs, audiophiles and audio enthusiasts who want to enjoy high-quality, multi-channel audio on the road or stationed at a desktop PC. Record with built-in stereo microphones or external stereo microphone Stereo analog line inputs and outputs for recording and playback S/PDIF optical digital audio input for recording digital audio with no loss of audio quality S/PDIF optical digital audio output for pass-through of Dolby Digital and DTS multi-channel DVD sound to A/V receivers or digital speakers Convenient Volume control with mute for silencing speakers Signal-processing system enables stereo headphones or speakers to recreate the sound of a multi-speaker, surround-sound system Digital ambiance settings for simulating concert hall effects Versatile Software Suite Voyetra AudioSurgeon LE