Patch 2 for Puyo Puyo Tetris PC adds proper music looping. But for some reason, the music only loops properly in the smpl chunk comes before the data chunk in the WAV file. While this is the case for music normally used in-game, apps such as Looping Audio Converter and VGAudio add the smpl chunk after the data chunk. MoveMySmpl moves the smpl chunk to before the data chunk so the music loops properly with WAVs created by apps like these.
Drag the WAV files onto the app, that's it. Only WAVs where the smpl chunk come after the data chunk are modified.
MoveMySmpl is licensed under the MIT license.