Notes about the XPA file extension:
Incorrect file associations could be the result of underlying issues within your PC system. As such it is highly recommended to scan your PC for invalid registry entries, unused processes and other unfavourable system settings to identify slowdown issues.
The XPA file type is primarily associated with 'SoniqSync' by SoniqCast, LLC. SoniqCast uses eXtended Playlist Attributes for storing attribute information for SoniqSync Extensions to standard playlists for audio media. *.XPA invokes SoniqSync.exe and that application will then, in turn, invoke the corresponding shell-registered application for each of the embedded media files (i.e., similar to a *.M3U playlist in that it contains a collection of media clips).