It feels a lot like guided meditation. The technician will set up the goals for the session on the computer. Then you have to try your best to relax. You’re staring at a screen with two very still black bubbles. When your brain activity is wrong, the two bubbles start separating into a lot of bubbles in a lot of neon colors, looking like a rave and the sound becomes super annoying and fast. When your brain works the right way, the noise almost disappears and the colors go back to the two black bubbles. With the progress of your sessions, it becomes easier to make the two black bubbles still and the noise slower.
It’s surprisingly relaxing. I’m content!