Have you got the speakers yet to complete the surround sound set up. If so, have you set them up?
Look on page E-7 of the Yamaha speaker manual. It shows you exactly how to hook up the speakers. The small satellite speakers connect to the speaker outputs on the amp using speaker cable. Make sure you wire the minus (-) connectors on the speakers to the (-) connectors on the amp, and do (+) to (+).Report back when you've done this.
The subwoofer left mono socket connects to the subwoofer output which is marked as connector 9 on page 10 of the RXV-361 amp manual. Use a phono-to-phono cable for this.
Any socket marked Out or Output is where sound or pictures comes out from. So when you think about your computer and you want sound out of it, you make a connection from the output. OK.Now we've got to sort out the style of signal connector.
If you want to get sound in to something (like your AV amp) have a guess which type of socket you use - in or out. Yep, you got it, it's the In or Input.
So just for absolute crystal clarity, we're connecting a PC card OUTPUT to the AV amp INPUT.
[[[ You won't get sound if you connect a sound card socket marked Input to any amplifier socket. And you won't get sound if you connect the sound card output to any amplifier socket market input]]]
You say your sound card is a Realtek. I'm guessing you probably got this info from something you saw on the PC screen rather than reading the brand of the card directly. Am I right???Now lets help you with your S/PDIFs, Opticals and TOSlinks.
Realtek make silicon chips. These go on to lots of different manufacturers sound cards. So the info your computer has given you is probably the chip makers details because that is the most appropriate piece of information if you need to get new drivers. It isn't the brand of the card. This means I can't check what sockets are on the card.
To be absolutely sure of getting the correct cable you should really try to find out the brand of your sound card. The answer is not Realtek.
Look at page 10 of your Yamaha Amp manual. See the sockets in the box marked? These are the digital inputs. The two square ones are Optical TOSlink connectors. The round one is a COAX connector. These all come under the banner S/PDIF. So you can have an Optical S/PDIF or a COAX S/PDIF. What you CAN'T have is a connection from an Optical output to a COAX input or vice versa without some sort of adapter/converter box in the middle.The final bit of the puzzle is getting the sound card to give a digital signal out via its Output socket. This might already be switched on, or you might need to go in to the software to switch the feature on.
On an amplifier the difference between Optical and Coax is obvious - Optical is a square connector, Coax is round. On a sound card the difference might not be so easy to spot. If the card has a square socket like the amp then you can be 99.99% sure it is Optical. But if all the sockets look like the small headphone jack sockets like you would see on an MP3 player then you need to find out some details about your sound card.
The reason is that both Optical and Coax can be connected with a plug that looks like a small headphone jack. Find out what type of digital signal your card outputs (optical or electrical) and you'll be able to choose the correct cable with the right types of plugs on each end.
* Six 1/8” analogue jacks (Rear)So it looks like you have a choice of either Optical or Coax.
* One Coaxial digital output (Rear)
* One Optical digital output (Rear)
* One 1/8” analogue headphones jack (Front)
* One 1/8” analogue microphone jack (Front)