Recommended to delete certain LevelXXIntros. Some of them such as LevelCTFIntro are not necessary do delete, because they somewhat fit the Loop.

How to Install:
(RECOMMENDED: open the modded mp3 folder and look at the levelXXIntros that are in the folder, the ones that aren't there you should delete.)
After you did the recommended step (or not) open the mod folders.
Directory to install is on the folder names. (bunch of folders with nothing inside until you reach mp3 folder)
Put Modded mp3 folder in the brawlhalla directory.

Uninstall by Validating Files or Uninstalling The Game.
Recommended to Create a mp3 folder backup if you use other mods.
Have fun!!!