Wikiwand! That's a wiki I never heard of before. Thanks!

Thankyou for sharing from your yourney! I love reading this kind of reports. Additionally, your way of expressing things resonates with me.

I have been hearing the silence since before I started my practice, I think. I can construct locations for it and separate it into different tones, or choose to listen beyond it, to the source of it, which has no location. I think of that space or presence as what I think you were looking for at that retreat, although I have never had the opportunity to do any such retreat. The awareness recognizing itself. I like your description of it and I hope to get to where you are. For me it comes as glimpses, sometimes brief glimpses and sometimes somewhat longer ones. There was a brief period recently when I thought I could access it rather reliably, by listening to where the silence comes from (that is, the location that isn't a location), but that was very premature. I trust that it's there and I know that there is no way to take control of it. It is there when there is no controlling. At those instances, it feels so simple. Freefalling is all that it takes. Like falling and failing to hit the ground, in a paradigm where actually hitting the ground is an effort.

Silence coagulating - I love that description! Yes, it does coagulate. Different tones also seem to be accessible to different extents at different phases in the cycling too, I think. That is a very preliminary reflection, though. I may be confusing different things, but I have this hypothesis that something that used to annoy me a bit in the dukkha nanas before was really an extremely slow version of the sound. It was like the flickering noice of pressure changes in my right ear, like opening and closing something there (which was accompanied by irritation in my left eye). In one review phase (?) recently, I could trace the sound as it changed through different nanas, so it seems that it can be an auditory version of those nana-specific vibrations. Another time, when I was using the sound as a concentration object, it seemed that the bodily piti and the sound were distilled into bright light, before that gradually dissolved into (and beyond) nothingness. So one might say that it can both coagulate and be distilled, if that makes any sense. 

Haha, I could have sworn that I heard voices in a gong yesterday. I think the boundaries between hallucinations and magickal creations is very fuzzy. I recognized the steps of it from earlier in life when I have actually developed auditory hallucinations (mobile phone signals, which I have heard is a very common hallucination among autistic people like me; there was a very ling thread about it on a forum that I used to frequent). It starts with interpretations of sounds within a noice that match roughly with a known pattern. From there the mind builds on it and fabricates it. It is interesting to observe the process gradually. This is off-topic, though. 

The flat face - yeah, that happens often. That accompanies the dropping of the jaw. I find that very soothing, actually. Early in my practice, before stream entry, there were all sorts of weird tensions, but I enjoyed that too. It felt like all my senses turning themselves inside out, one at a time. It started with touch in my hands against my thighs, but that in itself didn't feel like tension. It was more the feeling that I could feel the touch from the other side, backwards. Like it wasn't really any me doing the feeling. I found that very relaxing and kind of funny but also natural. I recognized it somehow. With the other senses it was more like what you described, with tentacles turning around. I could kinesthetically feel the hearing move out from one ear and make a circle in front of my face and then crawl inside the other ear, listening to myself, and something similar with the other senses. I loved it, althought it physically hurt a bit and was full of tensions, but there was also the sense that it wasn't enough. Frustration about the remaining duality and the inability to turn around. This was not the practice that tipped over into SE. In the review phase after SE, there was sort of a buffet of these experiences combined together, but still with that sense of incompleteness. Only recently I went through what I think was the no self door, which completed that turn. What a relief that was!

Okay, so that is what this is? Microcomponents of looking at oneself. That makes sense. Thankyou so much! 

I just listened to both of them recently.  

I don't need any help with these phenomena, though, just to clarify. I'm just curious and mappy in general, as the researcher I am. As for practice, of course I'd be interested in ways to work with this, but I'm not worried about what is going on. I think it is doing what it is supposed to do with or without my dabbling with it.

Thankyou! I'll check out those resources, as well as those recommended by Chris and Siavash above. I do some qigong exercises sometimes, and I do yoga several times a week, sometimes with pranayama, and I have started to look into Tibetan energy practices (there seems to be a number of different traditions there as well). I find it both interesting and slightly confusing that there are so many systems to this and that they are similar and yet different. I hope I won't mess anything up by mixing paradigms.

There is no need to consult a neurologist. This doesn't bother me and I don't think there is something wrong with it. It may very well be healing - tensions that are dissolving, pathways for nerve signals that are being unblocked, maybe some balancing of energy channels (probably very well needed). I'm just the curious intellectualizing type that finds joy in trivial matters such as explanation models. I suspect that neurologists have better things to do than satisfying my curiosity.  Of course I think you people here have that, too, but on a forum at least there is always the option not to read or engage with a thread. 

I think I'll try to follow the advice that Daniel posted today from Ajahn Ratt about keeping the attention centered, though, because if I feel into the sensations on my left side too much, that might enhance them and possibly cause imbalances. I seem to be prone to imbalances, so that may be very relevant advice for me. If I recall correctly, Daniel wrote something similar with regard to muscle tensions in his book. Maybe it can happen to glands as well. It wouldn't surprise me. It seems that paying attention to phenomena interacts with how they manifest.

I experience almost everything as some form of what you're describing. Have done so for around 5 years. The way I see it, thoughts/perceptions/aspects of experience are embedded in our bodies, in particular areas. They map pretty well to standard chakra maps, lower and upper (crown, third eye, throat, heart, solar, whatever this one is called, root) and then the lowers fear in hips, anger in thighs, insecurity in knees, confusion in calves, selfishness in ankles and self in feet and malice in bottom of feet. But the specific routes around the face are quite confusing for me as well. I get it mostly around the eyes, and then that can drip down and around, kind of linking back to the ear. Around the mouth as well I get it a lot, and in the mouth and in my throat, but there are also just random spots around my cheeks in certain areas. There are definitely different states of them, e.g. activity (where they are actively controlling/blocking some aspect of experience), for me this feels hot and leaves a trace. Then there is the release/transformation, where it leaves you feeling peaceful/that aspect leaving your experience, where they kind of burn out or drip down or move somewhere else. Then there is the passive, where they do not exist until you put your attention on them. In my view, awareness kind of leads to that burning stage, ignorance leads to them being in that blocking stage, but when they are atively blocking it's hard to get rid of them. You kind of have to catch them when you're ignorant or push forward when they are getting burned away. 

Thankyou! Yes, it feels like it has moved to the subtler parts of a restructuring process. It's fascinating. It even seems to happen far outside my physical body. Thanks for mentioning a map for it! I'll check it out and see if it resonates. 

Edited to add: I'm buying that book. Thankyou!