The first step is to download the file HERE. This is a trusted site, you will definitely not get a virus along with the dll file. Errors related to the x3daudio1_7.dll file can occur for the following reasons. For example, a faulty application that can delete or relocate the x3daudio1_7.dll file. It is also possible that a file has been damaged by a virus. The most common error messages: The program does not start because x3daudio1_7.dll is missing from your computer. Try reinstalling the program to resolve the x3daudio1_7.dll file. In the vast majority of cases, the solution is to overwrite the corrupted x3daudio1_7.dll file in the Windows system32 directory.x3daudio1_7.dll-related errors often occur when running applications, especially computer games, that require the use of "Microsoft DirectX". x3daudio1_7.dll is usually located in the Windows system32 directory, but it may also be in the directory of the game you want to run. For example: C: \ Program Files (x86) \ "Game Name" \ x3daudio1_7.dll Some programs that use this file are: Skyrim, Tropico 5.