There are many reasons why Fortnite sound would lag on your computer. To resolve the issue, we are going to take every single reason into account and then fix them.
More often than not, the issue occurs when Fortnite, which is a demanding game, trickled down on the scale of priorities. So, now the game, which is supposed to have all the resources of your computer at work at the same time, is unable to quench its thirst for power and end up either crashing, freezing, or their audio lagging. That's why we are going to give them the required power and see if that works
Also, we need to check whether the game files are corrupted or missing. If they are, then they can be resolved. It's quite simple, just verify the game from the Epic Launcher and the issue will be resolved.
We will also see some solutions that will take Windows audio problems into account and see how you can fix the problem.