My computer has odd things happen with sound. I'll share my setup and then follow with the issues:
PC (gtx 1070, HDMI out) --> Sony STR- DN1080 (AVR) --> LG CX (TV)
Speakers are in a 5.1 setup and work wonderfully when not going through the PC (my blu-ray player or the TV itself via ARC)
Issues with PC:
Right clicking on my desktop volume icon, I select 5.1. I go to 'Advanced Setup' to make sure the correct device is the audio destination. It lists my TV and not the receiver (I'm wondering if this is the main issue). Within my receiver I have 'Audio Out' set to 'AMP', not 'AMP + TV'. Also, under 'properties' the 'jack information' box only shows 'L R HDMI'. The issue manifests itself in different ways:
- Within my PC sound menu, if I use the 'configure' option, sound will come out of each of the 5 speakers plus sub, but when 'surround right' is supposed to make a tone, it comes out of both SR and FR speakers. These speakers are not incorrectly wired.
- When I choose the 5.1 option on my PC, my AVR screen scrolls 'Linear PCM 5.1 (3/2.1)' across the screen. Not sure if that's important.
- Certain video games fully engage the subwoofer and surround sound (Forza Horizons 4 comes to mind), but other games (Elder Scrolls, Tomb Raider) have the subwoofer suddenly stop being part of the soundscape.
- If I play music from Spotify, the subwoofer doesn't play and the rear speakers don't function. They all fully function if I use the Spotify app on my TV instead. Obviously, I can just use the TV app, but just wanted to point this out as another puzzle piece.
I've looked into this problem for a few days trying various things (passthrough settings, bitstream vs pcm, factory resets, BIOS fiddling, and can't figure out where the issue is. Would love any insight.