It was a long while back, and I forget who posted it, but it was basically mp3, but in surround sound. I think the first one was like a series of clicks that would go all around your head, then you would here like a door open behind you, and then what would sound like some guy walking through the door on a wooden floor. I can't remember exactly, but it was really cool, but I just can't find it.
Can someone help me find it? I've been searching forever.