Listening to that song, I donāt think its considered a āsuspenseā song. Suspense is supposed to make your heart beat and make you have panicky/scary vibes. I would call that song a medieval/action song.
It may be quiet, but while I was playing the game that it is from, I was panicked as crap, and the music didnāt help. (The music got progressively louder the further into the level you got.) I was literally shaking when I finally beat the level. Basically, the music doesnāt have to be that grainy, as the same effect (Affect? I never know which one to use.) can be achieved otherwise.
However, yours still does convey a feeling of suspense, and would work well in a horror game. I think itās great, I just wanted to show that the suspense can be achieved without a feeling of discomfort.
(Yes, this is an example from a Spongebob horror game. No questions asked please.)