sega cd iso and sound file

hi i have downloaded sonic cd from another site as this site dont have sega cd games :Pbut there is 2 seperate files to download, i have downloaded the iso and there is also a zip file with loads of mp3s, and the mp3s sound like they are in game soundsand when i play the game the only noise i hear is when sonic jumps, so is there a way to get them sounds in the game? like add the mp3s to the iso or something ???

I think theres a .cue file listing all the tracks, if they are in the location specified by the cuesheet then they should be added when the game is burned, I think

Use Alcohol 120% to make a virtual drive.

i am using fusion emulator to load the sega cd iso