1 x USB 2.0 Type-B female > 1 x S/PDIF optical digital input 1 x S/PDIF optical digital output 2 x 3.5 mm 3 pin stereo jack female microphone (L, R, Mono) 1 x 3.5 mm 3 pin stereo jack female headset 1 x 3.5 mm 3 pin stereo jack line-in 1 x 3.5 mm 3 pin stereo jack front speaker (L, R) 1 x 3.5 mm 3 pin stereo jack surround (L, R) 1 x 3.5 mm 3 pin stereo jack center / bass 1 x 3.5 mm 3 pin stereo jack rear speaker
Function keys: volume mute, microphone mute, volume-down, volume-up
2 x ADC (analog digital converter) and 8 x DAC (digital analog converter)