Hi, I recently got a gaming and I've been having the worst time trying to sort out my surround sound system with it. I'm using a 3080ti card with a Sony x900h tv and sony str-dn1080 receiver. Both the receiver and tv support hdmi 2.1 and have them activated. I'm also using hdmi 2.1 cables. I have both hdmi 2.1 slots in use on tv. My receiver is connected using earc straight to my tv and my gpu is connected to the other hdmi 2.1 on tv. Earc is activated on both receiver and tv. The first problem is whenever I start pc it won't pick up and audio. It shows that audio is working with the green bar when I test but I can hear no sound. The only way I can sort this is by switching to tv speakers then back to audio system on the tv. The apps on my tv don't have this problem plays as soon as I turn tv on. I have dolby atmos activated on my pc and it worked on gears 5 but for some reason some games play stereo and won't recognise I have surround sound set up. I had a look on properties for my sound device and for some reason it only supports 16 bit bit depths, 48.0khz sample rates and max format is 16 bit, 48000z dvd quality and won't show any other options. I tried setting speakers to normal 5.1 but the options were the same and very low sound quality. Also when I test speakers on 5.1 it works fine but atmos it doesn't. Some speakers may activate very quietly when I try to sound test the speakers on it. On my playback devices I also have 3 options for nvidia output, they're all the same and says not plugged in. The one I use is sony tv, nvidia high definition audio. If also tried changing about the tv and receiver settings to different formats but nothing. My switch and ps5 worked perfect on arc so I'm sure it's something to do with windows. Sorry for the long thread haha but I'm all out of ideas and really need some help I've wasted so much of my time trying to sort this.