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When I pass digital stereo (PCM) to my surround receiver it it's like I am suddenly in a small concrete room. There is a ringing sound that grates on my nerves, it's like extreme saturation or reverb of high frequency. I have tried applying different effects to the sound and can mask some of it but it is not listenable after about 15 min the noise just gets to me. The problem is worse with 'live' sound than studio sound.There is no problem with any digital surround that is passed (e.g. 5.1 decoded in the receiver is just fantastic).
There is no problem with Dolby Digital 2.0.
My setup is a PC that contains the DVD player/TV Tuner passing digital on the S/PDIF connection to the receiver. Receiver is capable of all the common decoding routines and my speakers are 5.1. I have the same problem with the TV tuner sound (stereo which is digitized by the PC) as I have with digital stereo PCM from disk.
Am I doing something very wrong? Should I pass the stereo to the receiver only as analog?
Follow Ups:
What is the motherboard on your PC ?? Go into the audio settings and turn off all processing of sound including equalization. I have a NVidia NForce2 motherboard with what is supposed to be great sound. NOT! Everything I have tried to process the sound creates some type of subtle to gross distortion. There are too many different processors that can feed the Digital stream before it gets to the digital out jack. Find every source of sound manipulation and set them to flat or off.. Mine has SRS, two different places where there is EQ and too many different sliders that can mix mics, CD player sound, midi and the likes. Turn em all OFF. You need an unmanipulated PCM stream for your receiver to work properly. Then turn off all the processing on you receiver and only when you get clean 2-channel stereo should you attempt to remanipulate the signal into something else with the receivers DSP chips if you don't like the original sound. Good luck.
Are you talking about relatively low-sample-rate PCM? Like 44.1 or 48k? If you're getting ringing at low sample rates, it usually means the digital filter in your receiver sucks.Another consideration is the digital cable you're using. If it's poorly made or poorly designed, or too short/too long, you can get ringing, noticeable mostly at low sample rates.
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