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How do I get 7.1 sound from my old pc to my receiver?


New Member
Jun 13, 2019
2 (0.01/day)
I have an old computer I've hooked up to my Yamaha RX-V779 home theater receiver, but I only have stereo so far, and that just won't do. The receiver doesn't seem to have any input for 7.1 sound other than HDMI, and the GPU (gtx 9800+) seems to only supports s/pdif 2 channel uncompressed, although I haven't been able to figure out if the motherboard even has those connectors. The motherboard (MSI P6N SLI) has a 7.1 channel High Definition Azalia certified audio controller, 6 configurable jack ports, coaxial s/pdif so with the right cables and whatnot, this should work out, right? What are my best options?
Oct 21, 2006
434 (0.09/day)
Oak Ridge, TN
System Name BorgX79
Processor i7-3930k 6/12cores@4.4GHz
Motherboard Sabertoothx79
Cooling Capitan 360
Memory Muhskin DDR3-1866
Video Card(s) Sapphire R480 8GB
Storage Chronos SSD
Display(s) 3x VW266H
Case Ching Mien 600
Audio Device(s) Realtek
Power Supply Cooler Master 1000W Silent Pro
Mouse Logitech G900
Keyboard Rosewill RK-1000
Software Win7x64
The manual says it has coaxial SPDIF, so I'd use that, from the mobo audio.

It should still work with the HDCP functions, and if not, use something to go around that, I did.


New Member
Jun 13, 2019
2 (0.01/day)
Is 7.1 over coax spdif really fine? Do I need to do something to set up compression or is that plug and play? Would it be the same if I managed to find the spdif connectors to get sound through the hdmi? I haven't bothered looking too closely as it as I thought spdif would be sub-par.
Jan 31, 2010
3,396 (0.93/day)
Gougeland (NZ)
System Name Cumquat 2000
Processor AMD RyZen R7 2700 @ 3400MHz
Motherboard Asus TUF X470-Plus Gaming
Cooling Cryorig R1 Universal
Memory 16GB GSkill TridentZ DR4-3200 16-18-18-38 1.35V
Video Card(s) Gigabyte RX580 Gaming 8GB
Storage 1X Samsung 860 EVO 500GB SATA AHCI 1x Sandisk 128GB PCIe, 12TB of HDD Storage
Display(s) ViewSonic VX2457 MHD 75Hz FreeSync 1920x1080p
Case SilverStone Raven RV02B-W + 3x SS AP181 + USB3.0 upgrade
Audio Device(s) Creative SB X-Fi Titanium Fatal1ty Pro PCIe + Pioneer VSX-531 amp Technics 100W Speaker set
Power Supply Enermax RevolutionXT II 750W 80+ Gold
Mouse Logitech G502 Proteus Core
Keyboard Logitech G105
Software Windows 10 X64 PRO (build 1903)
Benchmark Scores it sucks even less much now ;)
Yeah good luck in getting true 7.1 surround sound unless you have audio tracks that are encoded that way if you don't what you'll get is sudo 7.1 surround produced by your amp

After saying that SPDIF should just pass any DD DTS etc etc through to the amp to decode if the sound card you're using doesn't support any form of Dolby surround which a lot of onboard audio solutions don't you're probably going to be better off going with HDMI from the GPU to the amp
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