X3daudio.dll problems all have their origins in some way or another in a malfunction with Microsoft DirectX. The x3daudio.dll file is one of many files in the DirectX software collection. Since DirectX powers most Windows-based games and high-end graphics programs, x3daudio DLL errors usually only appear when using these programs.

Follow these steps in the order they are listed below to try the simpler solutions first.

Restart your computer if you haven't already. The x3daudio.dll error may be a fluke and a simple restart may fix it completely.

Install the latest version of Microsoft DirectX. There is a good chance that upgrading to the latest version of DirectX will fix the 'not found' error.