Hi! There's an instrument (at least I think it's an instrument, it could be sound engineering) that I have been trying to identify for a while and it sounds like a wind instrument, possibly some type of flute, and it's kind of like a moan/horn. You can find it on Cibo Matto's Artichoke (most prominently towards the end), parts of Half-Life's soundtrack and it's used extensively on the music for Bloodmyst Isle. It's a very haunting / exotic sound and I would love to know what it is. If it is an instrument I think I'd like to try and learn it.
Thanks in advance!