There are 2 file types use the .MUX file extension:
1. Trackmania Music File
Audio file used by Trackmania, a car racing game featuring the ability to create custom user-generated tracks; saves the background music for a racing track; similar to the .OGG format but is encrypted.
NOTE: MUX files can be decrypted to the OGG format by using TMDemux utility.
Updated: April 1, 2014
2. Myriad Stand-Alone Music Score
A MUX file is a music score created by Myriad musical notation software. It contains a stand-alone music score that includes sheet music as well as all digital instruments for the composition. MUX files are used for packaging a musical score in a single file.
Updated: January 5, 2017