I’ve listened to recordings for years by Kelly Howell from BrainSync.com.
She offers a few free downloads from her site, so it’s probably easier to tell you to visit the site rather than try to explain what the recordings are – and what they do for you.
Basically, they are “layered” audio recordings. Some have music and others sound more like vibrational frequencies. Anyway, they all contain some sort of aural brainwave frequency sounds added in that are helpful for different circumstances such as concentration, creativity, sleep, relaxation, anxiety, weight loss and so on.
The first time I listened I was very skeptical they had any effect at all. Five years later I’m here to tell you they work.
I’ll write more about the different ones that I’ve tried later. In the meantime, go check out Kelly Howell and BrainSync.com