I tried searching for a rip of the original version on here but I couldn't find anything; only for the sequel and some remixes.

I'd love to hear this game in FLAC quality as it has one of the greatest soundtracks ever!

Seconding this.

Thirding this.

http://switch.joshw.info/l/Lumines%20Remastered%20(2018-06-26)(Resonair)(Enhance)[Switch].7z

Thank you Vector!

EDIT: It looks like these sound files are only for the main menu BGM. Are there ones for the skins like Shinin'?