Crowd noise overpowers engine, and sometimes also glitches, turn that ♥♥♥♥ off, silence is bliss lets HEAR THE ENGINE!!

Step 1, Steam\steamapps\common\GRID Legends\audio\soundbanks rename crowds.bnk to crowds.bak

Step 2 , Create a new file called crowds.bnk

Step 3, Have your grass and play Grid Legends, Mo00oo0o0 ! ;)