The game's audio is and always has been one of its strong points. Two things will always stick with me about this game, Bill Roper's humorous voiceovers and Glen Stafford's awesome music.
It not only fits perfectly but adds a whole new level of ambience to WC2. WC2 is pretty dated by today's standards, but the music never gets old. For those who remember playing WC2 back in the old days listening to the music is almost as great a nostalgia trip as playing the actual game.
Rather than the jingly techno tunes in the prequel or the low-key ambiental crap in the sequel, WC2's midis strike a good balance between atmosphere and pace. The only doubt I've got is that some of the Orc tracks sound a bit too peaceful and reflective for a race of bloodthirsty savages. And the human victory tracks sound a bit wavery. But those are small complaints, overall.