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I have been trying alot to get the digital sound working from my HTPC but without luck. The setup is as following:
HTPC with ASUS H87M-PRO motherboard which has a SPDIF output using the Realtek ALC892 onboard soundcard.
I am running Windows Server 2012 and the (latest) realtek drivers, version 6.0.1.7071. SPDIF has been enabled in BIOS and the Realtek HD Audio Manager shows an orange SPDIF port - which I guess indicates that it is enabled.
When I plug in a SPDIF cable it's red in the other end, so something is happening. As the image also shows the Realtek Digital Output(Optical) is present and sound (from a playing movie) is being output - at least the green indicators moves up and down. http://snag.gy/298hL.jpg
In the receiving end I got a NAD T-775 receiver which supports digital input. I have confirmed this by using a HDMI cable in the same setup. DTS is working just fine through HDMI. I have made sure that I have selected Optical (and the correct channel) in the receiver.
That sums up the setup I would say - the problem is simple. There is no sound at all through the SDPIF.
I am looking forward to any feedback.
Anders
Posted 2014-10-18T13:29:49.540
Reputation: 31
Not the answer to your question, but for a similar setup I don't use the SP/DIF for 5.1, as that forces a double conversion which I find can confuse my amp. I've discovered it's better to just have the PC do a single conversion straight to 5.1 & send that as discrete 6-channel analog to the amp. It also, incidentally, gives me better control over the balance than the amp itself can do. – Tetsujin – 2014-10-18T13:40:38.300
Is there any particular reason you’re not using HDMI? It’s vastly superior, after all. – Daniel B – 2014-10-18T14:05:17.483
Yes there is very good reason Daniel B. The thing is that everytime I turn of the NAD receiver the sound through HDMI stops and it will only come back if I have the NAD turned on while I restart the HTPC. This problem also occurs if I change source on the NAD - say change to my Playstation. I guess it's a bug in the Intel HD Graphics driver – Anders – 2014-10-18T14:20:01.197