Asus STRIX RAID DLX User Manual - Page 26

English 5. I can't hear audio input (Mic, Line-in, AUX, etc.) from my speakers. • Please select the correct input as the recording source. If you are using Windows Vista/Win 7, please also go to system audio control panel to see the current default recording/input device is right. • Please remember to turn on the digital monitoring button for that recording source 6. Will PCM sound output through S/PDIF be just 2 channels even with different analog output channels? The S/PDIF protocol specification (IEC-60958) can only carry 2-channel PCM data or non-PCM AC3/DTS data. So, when a user selects PCM output for S/PDIF, the sound card will always deliver 2 channel PCM data through the S/PDIF output port. For attaining 5.1 channel surround sounds, you can select DDO, which will allow the STRIX sound card series to deliver 5.1 surround sound for DVD movies, and even stereo music. 26 ASUS STRIX Sound Card Series User Manual