Headphones are highly recommended! When it's all running, after staring it and playing with the Sun for a bit, close your eyes, and place your index and middle fingers against your thumb and go with the experience. The sound is 15 minutes long, and you could reach a deep theta, even gamma, brain wave state in that short stretch. If you don't the first time, just keep doing it. You eventually will reach the point of what I call "the dissolve."
First, RIGHT click this link and select "Open Link in New Tab" or whatever your browser might say to mean the same thing. Some browsers want to download the file, and if yours is set up that way, then you'll want to set it to open and play when it's finished. The volume control will be on the newly opened tab, or on your computer's audio player.
If the file begins to play immediately, and it should, then click here to open Sunspace.