Hello there! I believe this release needs no introduction. I got it in these very forums, but I can't recall who the original uploader was. Enjoy and comment freely, folks.

http://www.mirrorcreator.com/files/126UBM2W/Sega_-_SONIC_THE_HEDGEHOG_CD_Original_Soundtrack_20th_An niversary_Edition_(2011).zip_links

http://vgmdb.net/album/29131