Download: https://www.dropbox.com/s/imfzsb3erjprxio/WAV2EA.rar?dl=02
Now, I know this tool is pretty useless, considering wavs takes too much space, but heh, I was bored
How to use:
1: Convert the Wav using WAV2GBA(Included in the download)
2: Specify where your .bin is in WAV2EA
3: Fill in the textboxes(The ids for Replacing ids can be found in Music List.txt, and for group its in Group List.txt.)
4: Click save, the installer file should be in the same folder as the .bin
5: Copy paste MPlayDef.event in said folder
6: assemble with Event Assembler