low marimba
with bass boost/treble reduction is even better
The sound of water flowing through rapids.
My grandma¹s house is built right next to a small river, this was the sound that put me to sleep every night.
Wind blowing though pine trees.
I have this memory from when I was a kid. I was standing in the middle of the woods at my grandparents, watching big fluffy snow flakes fall around me. The only sound I could hear was a light breeze blowing through the pine trees. I don’t know why but it almost felt magical. To this day I still love that sound.
The gentle thrum of a Federation starship’s warp core.
My cat purring.
The save room music in resident evil 4.
Jokes aside my most relaxing sound is heavy rain on a tin roof. Followed by cats purring.