Audio sync is still an issue with 4.9.0, and tested using a few different network cards. The issue can be easily reproduced with both Normal and Low latency modes, although it may be less severe with the latter.

Please see the videos for how to reproduce, and the files used (linked/attached).

Latency: Normal - https://streamable.com/5p56f8
Latency: Low - https://streamable.com/b0dbsc

Over time, the audio/video may slowly drift out of sync. However, we can cause this effect immediately using the "static" image.

https://i.ibb.co/KGbPyPP/Image4.jpg - This is the expected result: frame "1" matches beginning of the 1kHz tone, hence in sync.

https://i.ibb.co/2Nch2Z6/Image3.jpg - The result after the "static" image has been shown: 1kHz tone begins at frame "54", 7 frames out of sync, or 116ms.

"Stress test" image file: https://i.ibb.co/SQhKMKQ/400pc-Gaussian-50pc-Grey.png
60 FPS Test mp4: 60 FPS TEST v2_1 START_AT_1.mp4_13MB.zip