Your post isn't very specific. Maybe you should record it so we can know if there's a problem with it or not.
Otherwise, there were 2 versions of sounds. The 1.0 release and the later 1.4/Windows release had two different sound sets. You may just be remembering the other one.
You also could just have rose-tinted, uh, earbuds. The original DOS version was anything but high quality, the sounds were only 8-bit 8KHz, and the 1.4 sounds weren't much better (11KHz)