xapofx1_5.dll is associated with the Audio Effect Library and the program Microsoft DirectX for Windows, it was developed by Microsoft Corporation. xapofx1_5.dll errors are most commonly caused when two programs share the same .dll file. When a program is deleted sometimes it will delete the .dll file associated with both programs. Errors can also occur from a faulty xapofx1_5.dll file or incorrect versions of the file.