Well, this discussion has gotten rather agitated. Could it all have been my fault? I dearly hope not. And while I'm not too keen on seeing the burgeoning hostilities prolonged, I certainly had promised a more complete appreciation of MoF's soundtrack. Here's the best part, too: I don't believe I fully agree with any of you. So I'd figured my own thoughts might be worthwhile.
In itself, Araujo's soundtrack is a decent one, giving Mirror of Fate its few, if limited, harmonic overtones, and most often providing a solid musical base to keep the game's action going. Certainly, compared to what we've seen in other titles of the genre, it benefits from its skillful orchestration and execution, making it stand out above.
And yet Araujo's score has its limits, and it ultimately fails to perform in the areas for which it was obviously not made. It does nothing to move or inspire the player; it does nothing to introduce variety or provide any concept of change; it fails to convey any sense of focus or direction, instead feeling static and flat; and most importantly, it fails to give the game any sense of individuality. When compared to the generally excellent composition of its predecessors, Mirror of Fate's soundtrack easily falls behind.
While Mirror of Fate offers a relatively large selection of musical pieces, nearly all of them fall into two straightforward categories: "battle" tracks and "platforming"/out-of-battle tracks. You'll be encountering battle music whenever you're asked to fight, whenever enemies are in your vicinity, or every time you encounter a boss. You'll find yourself listening to out-of-battle music whenever you leave combat: namely, whenever you find yourself exploring the castle or platforming through its many areas. Those that fit within those molds are near-identical in everything from structure and orchestration to tone and emotional effect. MoF's score gave me the impression that it had only two tracks -- and that isn't a good sign.
Let's look at the first pattern: you'll hear long, sweeping string chords, waning organically back and forth to a subtly melancholic atmosphere. Always muted and pensive, they're accompanied with soft cues from the orchestra, and their rhythm often set by the quieter wind and percussion instruments. Some give off a more eerie tone, and are accompanied by whispers or slight noises. The harmonies are there, but they're intentionally aimless, unfocused, wandering about instead of moving forward. On their own, these pieces might have been quite decent -- had they been used sparingly, their distant and saddened tonalities might have struck a chord. But as it is, they entirely saturate the game; you'll spend more than half of the game listening to them, and their constantly emulated mood ends up feeling far too tiring than it reasonably should. More importantly, these tracks ultimately lack substance; their music don't really go anywhere, doesn't come with any definite melodic structure; it's content only to move softly back and forth in a way that becomes incredibly tedious in the long run. The more often you listen to it, the more tepid and uninteresting it feels, owing to how shallow and static it actually is. As it stands, Araujo's score is nothing more than an artificial patchwork of aimless harmonies that never never truly amount to anything -- they just oscillate back and forth like an empty lullaby that doesn't want to end. That's all right for a few minutes; but it clearly overstays its welcome after several hours.
What's more, it happens to make the castle feel completely empty and soulless, something you're not absolutely looking for in a hack-and-slash game.
Now for the battle music -- it's as generic as you'll ever get it. It will always be the same: harsh, heavy rhythms; chromatic, dissonant sounds; agitated orchestral patterns; big, menacing brass overtones; noise-like cues; constant shifts in orchestration to keep the "tension" going. It's all precisely designed to pump your blood pressure up, to keep you on edge, to make you feel like you're in the heat of battle -- but there's nothing else behind it. Otherwise, it's the most empty and mindlessly repetitive music you'll find in the gaming world, and Araujo went for it. There really isn't much else to say.
I'd posted that 42-minute long video of MoF battle music earlier. If you can manage to listen through the entire without interruption, then you obviously have more stamina than I do. But I think you'll have understood my point anyhow.
So that was my more 'honest' opinion of Mirror of Fate music. Disagree with me if you will; but I hold true to my claim that Araujo's MoF soundtrack was among Castlevania's worst.