Notes about the WAXML 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 WAXML file type is primarily associated with 'AudioPlayer' by Adrian Wright. AudioPlayer is a small, free program that plays MP3, MP2, WAV, WMA, RAW, PCM, RIFF and AU media along with audio only ASF files as well as WPL, ASX, WAX, WMX, and M3U playlists. AudioPlayer parses playlists in memory, converts them to valid XML, and outputs the result to ASXML, WAXML, etc files. Those resulting files are then used to populate the playlist.