Conversion of mp3 files to mus file format

In case that you are looking for a way how to convert MP3 audio files for use in Minecraft you will need to find and download a special program called Audiotori, which is a dedicated cascading sound pack manager that allows users to add or edit audio tracks from MUS packs. As for other possible mp3 to mus conversion, it is likely that some other are also possible as both MP3 and MUS extensions are generally used for audio/music files.

Open MP3 file    Open MUS file