Asus XONAR PHOEBUS User Guide - Page 72

Q6: Will PCM sound output through S/PDIF be just 2 channels even, with different analog output

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Q6: Will PCM sound output through S/PDIF be just 2 channels even with different analog output channels? Answer: 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 Xonar Phoebus audio card will always deliver 2 channel PCM data through the S/PDIF output port. To attain the 5.1 channel surround sound, you can select DDO, which allows the Xonar Phoebus to deliver 5.1 surround sound for DVD movies, and even stereo music. 72 ASUS Xonar Phoebus

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ASUS Xonar Phoebus
Q6: Will PCM sound output through S/PDIF be just 2 channels even
with different analog output channels?
Answer:
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 Xonar Phoebus audio card will always deliver 2 channel PCM data
through the S/PDIF output port. To attain the 5.± channel surround sound,
you can select DDO, which allows the Xonar Phoebus to deliver 5.± surround
sound for DVD movies, and even stereo music.