Gefen Digital Audio Decoder (GTV-DD-2-AA) Allows listening to digital audio sources on legacy analog sound systems 24-bit incoming bitstream on left and right channels Digital interpolation filter and digital to analog converter (DAC) Converts S/PDIF or TOSLINK digital audio to L/R analog audio Supports up to 6 channels (up to 5.1 Surround) of audio encoded in Dolby Digital