1. Compressed formats like MP3 do not retain the sound quality necessary for the brain to fully achieve brainwave synchronization – and are too inferior to effectively deliver even binaural beats downloads or isochronic tones properly, much less something as powerful as NeuralSync™. Our lossless audio entrains at the precise level guaranteed to induce the most potent response.
I tried other companies the last few years or so….among the likes that mainly used binaural audio and the deepest I was really ever to achieve was alpha state….maybe theta once or twice over the last few years. It takes incredible dedication and practice to achieve the deep, renewing states of meditation that are most sought after…..I listened to the theta meditation mp3 last night and within what seemed like a few minutes my mind was flooded with imagery…memories long gone…my body was sleeping, heavy as lead, but my mind was crystal clear, aware of my surroundings. I could barely even open my eyes!
I have also noticed that during my morning meditation session (I use the product twice daily – once in the morning and again at night), I’m able to almost instantly reach extremely deep levels of relaxation. In fact, within minutes I lose all sensation in my extremities. This is exactly like yogic meditation’s pratyahara, or sense withdrawal, state. It’s really quite remarkable that I could get that relaxed that quickly. This process usually takes me anywhere between a half an hour and an hour and a half. With EquiSync, I reach the same state in literally 2 to 5 minutes!

Now next point to make here is that many of the other promised benefits of brainwave entrainment stem from this basic foundation.  For example, it has been said that listening to brainwave entrainment resets the brain’s sodium/potassium ratio, greatly decreasing mental fatigue, and improving the transporting of positive neurochemicals between brain cells.  This promise rests on the fact that it has been shown that this occurs while one is in the theta state. Therefore, the answer would be that yes, because these audios do lead one’s brain into the theta state, then it follows that they would promote the resetting of the brain’s sodium potassium ratio.
In general, we are accustomed to being in the beta brain rhythm. We are in a Beta brainwave pattern when we are consciously alert. It is the default and dominant brainwave for most of us most of the time. We are in Beta when we feel agitated, tense, hurried, pressured, afraid and stressed. The frequencies range from 13 to 60 pulses per second in the Hertz scale.

This is the reason why I stress that one should ALWAYS read the instructions provided by the brainwave entrainment product creator, and always do their due diligence in researching the source of any products they purchase. When using a high quality product, these instructions are clear, precise, and always backed up by an extensive network of support and additional information. The product creators who have put in the necessary amount of effort and time to come up with a high quality product always make sure that you don’t get it wrong. 
Targeted hemispheric changes: Some speculate that specific alterations in brain waves can be made on an individual basis. In other words, you can target one frequency in one hemisphere (via the right ear) and another distinct frequency in the other hemisphere (via the left ear). The left ear affects the right hemisphere and right ear affects the left hemisphere.
The activity of neurons generate electric currents; and the synchronous action of neural ensembles in the cerebral cortex, comprising large numbers of neurons, produce macroscopic oscillations. These phenomena can be monitored and graphically documented by an electroencephalogram (EEG). The electroencephalographic representations of those oscillations are typically denoted by the term 'brainwaves' in common parlance.[4][5]