This is a very powerful practice, I went deep into the so called Solfeggio frequencies, spent one week just toning these seven notes, one for each day one for each chakra.. This is not new, but what is, is where I use a simple sinus waveform as an exact refference for my voice to magically produce these overtones that works as portals (for me) to new angels in the cosmic flow of light..
If you want to truly experience what Solfeggio is, please use your own voice and tone with me in this halv hour long ballancing!
Love/Eric