What do I search for to find music/audio like this? It sounds so beautiful.
Try this:
https://www.youtube.com/watch?v=x-OAHzyBIas
or this:
https://www.youtube.com/watch?v=8WGx5z9wVNY&list=PLfimnwaZdu...
Probably because it uses the same 303's and 909's :)