Turtle Beach Riviera 5.1 Channel Selectable 2, 4, or 6 analog line output channels with 16 Bit resolution at up to 48 KHz sampling rate Converts stereo sound sources to multi-channel format - for listening to MP3 music with enhanced surround sound on 4 or 6 speakers Game Port for dual analog joystick connection & MIDI In/Out (interface cable is optional) Supports Game Surround Sound APIs such as EAX, HRTF-based 3D positional audio, DirectSound 3D & A3D 32-bit PCI bus master