[quote=ktorpil;55742234]No need to be sarcastic. It is clear that you don't know anything about the sound processing capabilities of the sound card (EAX, ALchemy, DirectSound emulation, crystalizer etc.) and it's superior hardware compared to my GTX 1080s' inferior 10 dollar integrated audio chipset AND the fact that it is a discreet audio solution compared to a coil-whining-90-degree-celcius-running video card.
Yes it works. Without any enhancements/processing which I need. If the only difference was the DAC of the receiver, than it would be pointless to have a sound card at all and we would all be using onboard audio. As for the pass-through, I think it would be ok with the Marantz with it's 4:4:4 chroma subsampling support, but I wouldn't take any chances since my TV already has considerably more input lag than a monitor. With the Denon, I think it's futile since it blocks anything higher than a 1080p signal to pass.
Can't speak about your receiver, but if passthrough works correctly it shouldn't add lag. Maybe 1ms if that, as far as I know.
When you are transmitting digital sound, and without going into the madness of esoteric audiophiles, yes, the only difference *is* the DAC of the receiver. You mention enhancements and processing, but that can be done on the PC side through software or on the receiver side. Crystalizer you mention is nothing special, a simple DSP. If you are a fan of EAX effects, I can understand, no problem. Not sure what you mean by "Direct Sound emulation".
A coil-whining-90-degree-celsius-running video card transmitting digital audio is doing so bitperfect, with no influence from temperature or coil whining. Otherwise you wouldn't get Dolby Digital or DTS working through it when bitstreaming.
I've yet to notice any delay. I don't have a monitor. I have a 49 inch 4K TV.
It's not the delay I was referring to. You complain about bad sound and then proceed to compress with a lossy codec the audio signal. In the case of mp3 files you mention below you re-compress an already lossy source. That's bad for good sound.
Uncompressed and unprocessed. Try listening to an mp3 file and getting sound from all 5 speakers using an HDMI connection.
Yeah, what about it? All receivers I've ever owned offered an all channels stereo mode. If they don't you can get it from plugins with foobar and other music players. Upmixing is not rocket science, especially if all you want is simply having stereo played back on all channels.