Different beats will influence different brainwaves. This is why it’s important to know what effect you desire/require.

The activity in our brain is constantly in flux, moving from one level of activity to another. Modern living keeps us in a state of high activity, when we need to naturally be in a flow of all 5 through the day and night.

Here is a brief guide to each brainwave and their effects! Choose which one is appropriate to the outcome you want. Need to relax, alpha or theta is best. Need a bit of pep, Beta waves (although most of us are already in the state). If you need pep but not frenzied, a more level approach then alpha can always be an option.
Want to process new, abstract info, then thats Gamma. 
This is a very brief guide but will help you get started!

✨Gamma: high performance, deep abstract thinking - creativity, processing information, said to link and “open all parts” of the brain, compassion, super power meditation.

✨Beta: alert, focused, motivation study - caffeine type focus, most of is are in this state - invoved in the fight or flight response.

✨Alpha: calm, relaxed but alert,
increase beta-endorphin, noroepinephrine and dopamine. The same feelimg after a good yoga class!

✨Theta: calm, zen meditation type state, often in sleep, subconcious, great state to repeat affirmations!

✨Delta: deep sleep, dreamless state, restorative sleep, Impacts human growth hormones! (HGH maintains the skin, bone density, cartilage, joints and can also help heal physical pain. Melatonin &
DHEA witch of the North to Cortisols witch of the East)