This is a possible avenue I can use. Replace unused music and reference those IDs instead. Thank you.
Well that's annoying. You piqued my curiosity with the music.tbl file, though, so I'll try fiddling with that to see if I get anywhere.
I'm very new to modding Cave Story, in any capacity, so...
I'm wanting to do some soundtrack replacements, and I've done a bit of research and perusal earlier, and this is what I've found
CS+ uses a similar music "lookup table" to Freeware Cave Story (with the .ogg versions allowing intro and loop sections)
Simply editing .tsc files to change the music...