PROBLEMS THAT I HAVE

I have many problems
1. I want to spawn 10 cars but it lags hard
2. When i spawn 10 cars, the game won't pause to my will.
3. The replays have no sond.
4. The slo-mo feature affect my replays weirdly

Any help, Please help
--- Post updated ---
*sound

 

For your first two issues, it may simply be that your PC is not powerful enough. If you can, post your PC specs.

For your third problem, I don't know what specific sounds aren't playing, but in BeamNG, some sounds, like horns or sirens, are not played back in replays, if that's what you mean.

And for your last problem, I'm just guessing here, but I assume you're talking about how parts that have fallen off of vehicles tend to shake and jitter or how some things (like wheels) can look as if they are moving at a low FPS in replays. This is just how the game works, but you can minimize this effect by recording the replay in slow motion.

Hope this helps!