Aah! Ok, got it!
Happy_amateur wrote:What I need is the raw AC3 output from digiface optical out. Is this even possible?
Yes, I think it is!
I haven 't tried this, but I don 't see a reason why it can't be done, since it 's mentioned in the manual, as well !
So, firstly, set Sample Rate to 48KHz at the DF Usb Settings
then set the ADAT Out Port you 're using for the reciever to "SPDIF".
Now you have to route the signal from VLC to that ADAT Out port, using TotalMixFX.
Select the ADAT Outputs(1/2 or 9/10 or 17/18 or 25/26, depends on which ADAT Out port you 're using)
in the Hardware Outputs(third row), by clicking on them
With that Output selected, raise the Software Playback channels(second row) where the VLC Output corresponds to, to 0dB.
I don 't know if a setting in VLC is, also, required, but this should do it!
EDIT: I found this for VLC:
open the video file with the VLC player, and press Ctlrl+P
Under the Audio tab, change the output module to "Windows Multimedia Device output"
and set HDMI/SPDIF audio passthrough to "Enabled"(AC3/DTS only)
Click save and close VLC then open the video file again with VLC (basically just restart VLC),
RME Gear: Digiface USB, HDSP 9632