In Rivain Coast areas like the Tide Flats, there's a repetitive tribal drum beat that's using the SFX sound channel. This should be on the music sound channel, so that we can have it turned off along with other music. It seems like a bug to have to turn off combat sounds in order to mute drums that don't have an in-game source (there is no drummer).
So I was playing through this area again, and realised that this might not actually be a random sound, but it might be meant as a "timer" for the brazier puzzle in the Tide Flats. If that's the case, then this is a horribly distracting and annoying sound, kind of like having the Jeopardy theme playing when you're trying to think (iow, if not a bug, then please log this as misophonia-based feedback to not use those kinds of sounds, please... the ticking that we get in other areas like Treviso is much more tolerable).
I figured that would be it, and yes, it's really obnoxious. š
