You can try blindly replacing the .dat extension of the audio files with one of the many ADPCM extensions that
vgmstream plugin supports. That's how I eventually managed to get audio files I extracted from the Wii version of Just Dance 3 a few years ago playing correctly...
Edit: Oh, wait, I saw your video and also found the audio file you've uploaded is abnormally huge. My bet is that those .dat files are still packaged and you'll need to further unpack them to get to the real files (hopefully they'll have useful filenames and extensions)...
Hi, thanks for the input.
So the files are this big because they are very long (sometimes over 2 hours).
It's usually play by play files with commentary for the on game action.
I know that because they are already playable in audio editing software Audiocity. The quality is just very bad, due to the wrong codec, I guess..?
Also to clarify, the point of doing this not just being able to playback these files, but more importantly to edit them, replace them by other- higher quality sounds.
So what I need to do is open these big files (each of them contains many different sounds), find the exact sound in that file, replace the sound, save the file and re-import back in the game
Any ideas?

so I've been playing with this for a few weeks and I'm just not getting anywhere.
Are there any known and working sound mods for a Wii game?
I mean any Wii game
Thanks.
Yes, there are tons of working sounds mods for Wii games, but that won't help you since each game uses its own file types. Generally, the best way to figure out what kind of file you're working with is to crawl around with a hex editor and look for a familiar-looking header or something similar. Usually they'll have some sort of plaintext, so it can be easy to tell, but that's not guaranteed.
Thanks for the info mate, so that means it's doable! Which is good.
I just don't know how, that is little detail
