You might want to do a little reading on all the various brain waves, Alpha, Beta, Gamma, Delta, Theta (not in any order). Each brainwave will help a magician in programming themselves, as well as opening the third eye for various tasks.
There is also something called “binaural beats” that you can find on YouTube. These are tonal beats that, when listened to with headphones, will take your brain into the desired wavelength. I often use “deep theta” for meditation, and it’s WAY easier than spending years and years in meditation practice to get that deep.
Eventually, though, you’ll want to try it without the sounds once you’re used to the feel of that frequency. Once your brain has experienced it a few times, it’s much easier to drop into it without the sounds.