Very spooky, I think you hit the nail on the head with this atmosphere. It sounds almost calming and calling to you, but seems very off at the same time. Whenever the volume starts to subtly get louder for a few seconds it makes this kinda scary feeling that makes you want to hold your breath. It would work very well in some kind of horror film or game, to show something that is either meant to be slightly disturbed or off/uneasy. Amazing work, keep it up!

Sounds like something I'd hear in a horror movie. Nice one.