After today’s update the sound of the game went super low to the point where you can hear a static noise. Me and a friend having the same issue.
I got no sound at all, except for the intro racing car sounds.
I found that you need to raise the master volume.
Still requires a lot of volume/dynamic range rebalancing in car sounds. I wonder when that will arrive.
Same here, only Turn 10 intro has sound and after that there is nothing.
Edit: updated audio drivers and reset sounds in game to default, all working now.