I've set the file to replace mus_levelup_02.xwm (the one where it's only brass instruments) because I felt that was the worst of the three, but rename it to "mus_levelup_01" or "mus_levelup_03" to replace one of the others

Replaces ui_levelup.wav (the original was a single horn playing) with a shorter version of the FFXIV Ding.