If you encounter missing faudio.dll errors, it is not a Windows system file—it belongs to a specific application or game. You can safely download it from the official FAudio GitHub repository or reinstall the game/application that requires it.

faudio.dll is a dynamic link library file associated with , an open-source, cross-platform audio processing library. It is widely recognized as a reimplementation of Microsoft’s XAudio2 (specifically XAudio2.7, XAudio2.8, and XAudio2.9) and X3DAudio.