"I'm going to order these from lowest to highest frequency, if anyone wants to check these out."
They've done a bit of good for my brain, and I think if you're interested in this kind of stuff, that you should do a little research into it to see what waves will work best for the things you need your brain to do.
A longtime friend of mine turned me onto this and it's pretty beneficial. I've literally had the hardest time getting out of my depression, and as I'm not completely not depressed, I have been able to start getting better.
https://www.youtube.com/watch?v=HKnfB6hdH_s
https://www.youtube.com/watch?v=BWYyGMuZSgc
https://www.youtube.com/watch?v=ZrGrYyScwjQ