The GOG and Steam releases of I Have No Mouth, and I Must Scream included an enhanced version of the soundtrack.
With the help of ScummVM developers, two fans by the names of SirAlastor and Alpheon, went through the game and found all the music cues, and Alpheon posted instructions tto change the music from the included soundtrack to tracks that ScummVM would read, so the music could be played within the game itself. He also posted a video showing the enhanced music in action, compared to the music from the original game, which you can view embedded below or here if the embedding doesn't work for you. The difference is quite striking.
