Thanks for clarifying. I've been trying to capture video of it and well, I'm fairly bad at that! I did notice it'll do one of three things:

1. Play normal (that metallic woosh sound).
2. Play kind of stunted. (could also be fading).
3. Be completely silent.

I had just teleported into Limsa Lominsa and changed gear sets and it was dead silent. So I'm guessing it does all of that based on what's happening around. I won't worry about it, thanks for checking!