Converting/Combining BMS music folder?

[Altivu]

Hello, I admit now that this is going to be somewhat of a drive-by post as I do not play FFR anymore, but I was wondering if perhaps someone could quickly help me with something semi-related seeing as how there are a lot of stepartists here.

So I've ran into a few folders containing a bunch of fragmented .wav, seeming to be snippets of the instruments to the song (ex. .zip files found here.) I'm assuming that you normally load this into IIDX/similar music games and it'll convert it for you, but is there anyway to convert this into listenable format outside those means?

Thanks for any help; sorry if this question has been asked before, as I don't even know how to begin searching for answers.