SoundSync

SE: Audio file with an extension other than mp3.
BGM: Audio file with mp3 extension.

Press and hold A to J to select the file of each button, play with the button tap.
Activate setting with SET SLOT.
Slot change with DOWN, UP. Switch to slot 1 with SLOT 1.
In the check box, select the slot to use.
Change setting with SAVE. Load setting with LOAD.