How is music related to Neidan Daoist alchemy?

I did state that I didn't get it, you have that in your quote, so you might safely assume I did not understand your explanation.

And I do not understand how this is related to Nei Dan, but again, I do not practice Nei Dan. I just sometimes discuss it on this forum.
So, to simplify: I do not understand how (A, which I do not understand) is related to (B, another subject I do not understand). 😁

At least I know I'm ignorant.

Btw are you allowed to visualize in Hsing-I? Bruce Frantzis say you should feel, not visualize. 

"Nei dan" is a term that has recently been used for Western marketing. Just as qigong was the term the Communists used to promote self-healing training. People get hung up on words. Even in Western music people think the words are more important than the sounds. For example "Dragon and Tiger" is yin and  yang as alchemy - long before the term Neidan was used. So if you practice Dragon and Tiger does that mean you are not practicing Neidan? No. Every human culture on earth uses the Octave as 1:2 and the Perfect Fifth as 2:3 and the Perfect Fourth as 3:4. It's only since the Greek Miracle of the West that we used the wrong music theory to create logarithmic math that everyone learns when they are 14 years old - so the Lie gets hard-wired into people as a "contained" materialistic geometric infinity that tries to have a "one to one" correspondence between geometry ( as a phonetic letter symbol) and Number. This "one to one" correspondence doesn't exist. It's a logical lie. But people don't learn it's a lie in school - so instead they try to create a one to one correspondence between words and reality. haha.

So in terms of music - it's pretty simple. I studied music intensely as a youth and then I took music theory in high school - privately. I realized there was a logical error since in Western music tuning the Perfect Fifth has to be 3/2 as C to G (overtone ) but can NOT be 2/3 as C to F undertone. And also 4/3 is C to F and NOT G to C. So I kept this to myself - I noticed it as a logical error - an inconsistency. I wondered why. Then I studied privately with a former University music professor. I asked him about this and he just blurted out it's because the ratios are logarithms. OK. But then he taught me a trick. If you silently press down a key on the piano and then you hold it down and then strike a different key below - the upper key will sound out on its own - magically. No contact. But the trick is that it has to be a close harmonic of 2/3. So then it hit me - this has to be the truth of reality as an infinite harmonics that is healing energy and Pythagoras was correct. My teachers were pissed at me for taking this position but they did start giving me books on spiritual influences of creativity of science and music - and my teacher even gave me a copy of the Tao Te Ching.

So when I learned the Pythagorean Theorem - I knew it was based on the wrong music theory! I kept this to myself again since obviously no one is to question the proof of the Pythagorean  Theorem.  But then my first year of college I took quantum mechanics and I was taught quantum non-local entanglement and 720 degree spin. I knew this was the answer but how was it connected to music harmonics? It is based on the wave equation and music is waves. In fact I didn't realize how correct I was till I studied science a lot more in detail. So again I kept this to myself and I got my undergraduate degree and then my master's degree.

So after I experienced qigong master Effie P. Chow in 1995 - then I knew this stuff was real and I went out to San Francisco in 1996. But I didn't have the money to go see her and my Chinese friend said that stuff is just for old people and he drove me up to Portland's biggest bookstore. There I discovered Dr. John Beaulieau's book on Biosonics wherein he clearly states that Yang is 2/3 and Yin is 3/4. Suddenly the connection made sense. So in my master's thesis I documented this to be true - that Daoist alchemy is from music harmonics.

But then I had to test out my hypothesis - and so I did the intensive qigong training to finish my master's degree. I realized that the small universe meditation was the 12 harmonic nodes of music theory but as infinite time-frequency energy. So if you practice the small universe meditation c.d. - the OM and Mua alternate - with each node. In Chinese music harmonics the same is true - as I just posted to you - the 4/3 and 3/2 alternates. Chunyi says that OM is the energy going up the spine (so it is yang) and Mua is the energy going down the front (so it is yin). Master Nan, Huai-chin says OM is the sound of Qi entering into the body - so that again is Yang. Mua is the sound of energy leaving the body - so that is yin.

So then if you read Foundations of Internal Alchemy - it states clearly that the  Small Universe meditation is based on the 12 notes of music as infinite resonance. So that is the final corroboration of my hypothesis.

Now what does this difference in music tuning mean? I called it "complementary opposite ratios" for years and tried to explain to people how it was different than Western music tuning and typical western logic. I had read  Fields Medal math professor Alain Connes stating that music theory provides the formal language for his model of a unified field theory - of relativistic quantum physics. But the book was not technical - it was philosophy. I was not sure how metaphorical he was - although his philosophy is based on noncommutative phase and that fit what I had called complementary opposite ratios. So then posted on youtube was Alain Connes music lecture and he goes into the music theory in specific and it is the SAME as the Daoist harmonics. It is because the ratios are noncommutative that music has a geometric dimension of zero but is also the 5th dimension that is non-local consciousness or formless awareness with an energy.

So then if this is true on a psycho-physiological level then that means it must be true for all humans just as all humans use music - this training must be found in all human cultures on some level. It is the innate energy dynamics of reality and so it must be rediscovered by accident, etc. So then I discovered how the oldest philosophy of India is also the "three gunas" based on the same music theory as Daoism! And as I mentioned this is the same as the Orthodox Pythagorean training. It is very simple but very radical and so most people don't even know about this training since we've all been mass mind controlled by Western symmetric math logic since Plato.

So call it what you want - dragon and tiger, yin and yang, the three gunas, N/om. Every culture has a different name for it - in Ancient Greece it was called Aion and Thymus.

But the fact is every culture uses the real music theory and it is from the original human culture - the San Bushmen. In fact these harmonics are hard-wired into our neurons and seem to be hard wired into all of life as well. A few other scientists have made this same discovery as me also.

To feel and not visualize - we can call "feeling" to actually be proprioception that is the 6th sense from Ultrasound. Science knows that our sense of hearing is the last perception to go at death. This is also true in the Tibetan Book of the Dead - to be read to the dead person. So the highest pitch we hear externally actually resonates the brain as a whole as ultrasound. This ultrasound then resonates the microtubules at 3000 times great electromagnetic amplitude than any other frequency. The microtubules are only 6 times bigger than the tubulins - and so this means the tubulin have quantum coherence that is non-local via this ultrasound connection - and through an infrasound subharmonic. Certain scientists have figured this out but the ancients describe it. It's in the Tao Te Ching - the highest sound that can not be heard.