[hifinoob005]

Hello,

I have a Xonar DGX and would like to use the Dolby Headphone feature via SPDIF. Specifications state that PCM only supports 2 channels in this output.

Origin source will be 6/8 channel. Final output is headphone.
Does Dolby Headphone mix the 6/8 channels into 2 channels so it will work fine, or will it be some sort of 6/8 channel PCM ( or Dolby/DTS if the source is such).

Thank you.

 

[PurpleAngel]

The Asus Xonar DGX will take in 6-channels (5.1) of PCM digital audio and convert it into 2-channels of Dolby Headphone (24-bit/96k max), which can then go thru (as PCM digital audio) the S/PDIF digital port, to lets say an external DAC (2-channel DAC)
Or you can enable the DGX's DDL (Dolby Digital Live), which will take in 6-channels of digital audio and compress it (24-bit/48K max) and send it thru the S/PDIF optical port and whatever device the optical connection goes to would also have to have DDL (like an A/V receiver) to then convert the compressed signal back to 6-channel of PCM audio (24bit/48K max).

 

[hifinoob005]

Thanks for the info, but I can't find the DDL in Xonar, just PCM.

 

[PurpleAngel]

Thanks for the info, but I can't find the DDL in Xonar, just PCM.

It looks like Asus has changed the software (to Sonic Studio) for the Xonar DGX and may no longer offer DDL.
Delete the current Asus software for the DGX and install the Unified Xonar Drivers.
http://maxedtech.com/asus-xonar-unified-drivers/

 

[hifinoob005]

The Uni drivers don't have it either.

 

[PurpleAngel]

The Uni drivers don't have it either.

Wow, did not know DDL had been removed from the drivers, I use the Uni drivers.
But you have not need for DDL anyway. as the Dolby Headphone output, thru S/PDIF is a 2-channel PCM audio signal.

Just figured out that in the Uni control panel, the Audio Channel needs to be set to 6-channel or 8-channel for the Dolby Headphone option to be offered.

 

[hifinoob005]

Just figured out that in the Uni control panel, the Audio Channel needs to be set to 6-channel or 8-channel for the Dolby Headphone option to be offered.

Output needs to set on Headphone to enable DH. Audio Channel setting does not make a difference.
DDL is still not present regardless of settings. I don't have anything connected via SPDIF, maybe it would show up then.