A number of SFX will not play during extended gameplay (40+ minutes) and get progressively worse over time until there is very little/no audio at all. Reloading a save will resolve the issue.
UPDATE: Example video here:
Please ignore the weird video glitch caused by Geforce Experience capture. This is not visible to me as I play and only happens with Satisfactory recordings. It appears to be a recording bug within the game and GFE software. The video was recorded at native 4k and downscaled to 1080p for upload to YouTube.
Software that was only open in the background for this run of the game that is not typically running while the game runs: SL-OBS, uTorrent.
Occasionally regardless of map location, proximity to object and object generating sound -some- SFX do not play when expected to however all SFX work fine for roughly the first 40 minutes of gameplay.
After almost an hour and a half, there is now only the occasional footstep, uncommon SFX like spitter attack or bird chirp, I have also noticed a large increase in temporary FPS drops but cannot attribute these with certainty to the Audio glitch however these areas predominantly are free from issues within the first 40 minutes of gameplay
2-hour mark: Music has started to play again and one or 2 SFX are now playing (Loco hum, water SFX - most others are still broken)
Testing method/Advanced Description:
I have tested with the Rifle and Jetpack across a number of different locations on the map from within bases to the middle of nowhere and, for the first roughly 40 minutes of gameplay SFX's are playing as expected. After this time, however, some gunshots are no longer producing sounds and the jet pack also no longer makes sound most of the time. This progressively gets worse from that point on until no music plays and there are no longer any audible SFX playing at all
i7 6900K @4.3Ghz, HTT off, 2TB Samsung 970 EVO SSD for game files, GTX 1080 Ti Video card rendering at 4K Ultra settings (431.60 Driver version), Logitech G935 Wireless headset and latest G-Hub application, Other audio working normally when game audio does not.
PC has been restarted, Game files for both Stable and Experimental build have been verified.
Reset Reverb - No Change
Adjusting volume options - No Change
Alt-tab - No Change
No Alt-tab for the 40 minutes of gameplay - No Change
Change location away from anything buildable that makes noise - No Change
I will update this as I encounter anything else that is worth mentioning.
Test: Output via Nvidia DisplayPort Output - No Change
Closed Logitech Software - No Change
Unplugged Headset adapter from system forcing the use of external speakers - No Change.
Test: Left game idle for ~1 hour - returned to find the issue has occurred
Shut down all non-essential software for OS running - No Change
Ran with Chrome open/closed - No Change
Test: Start the game in an area with few Trains running - issue takes about 1 - 1.5 hours to get very bad rather than 40 minutes. There are only 2 trains on a long loop (~6-minute loop) in this area. Other area has far more trains (5+ on shorter runs -2-4 minute runs- for other areas)
Test: Depowered all nearby trains, save and reload - Trains are no longer starting or stopping within SFX range however it audio glitch happened within 20 minutes.