I have several. Mostly of the ocean, because my associations with the ocean are so overwhelmingly positive it makes an amazing cloak of white noise, when it comes to relaxing and sleep. But I found someone who records nature noises and sells them. Soundscapes, as it were. And he has one of a mountain night in Georgia that is seventy minutes of the sound of my happy childhood. I'm listening to it right now, and even with all the storm and stress around, the grief in the city I consider my spiritual home.....it's good. Very good. There has to be a word for it, not just nostalgia or reminiscence, but.....when you summon up something very old in your life, and it hasn't lost any of its power to move you.