FOUND SOLUTION!!!!!!!!!https://respawnfirst.com/assassins-creed-valhalla-crash-fix/it works!
@mpwarner "If you are using the controller with Bluetooth, then that’s causing the audio crackling and stuttering. Use the controller with a data cable plugged in and the issue will be fixed."
@mpwarner are u playing on PC? if so i had problem when i tried to increase priority in task manager. that was the part of the problem. Im using keyboard and mouse so if you have one try it.
im having the same problem. its even worst when somebody starts speaking. sounds like a robot....