The amazing technique of Sound On Sound, recording on magnetic tape with erase head disconnected so that sound is recorded on top of sound like painting without loss of generation

At your risk. Yes it works. Tascam porta 03 was used by removing the erase head connector. On experiments recording with no input signal there is some loss of treble (demagnetisation due to the bias)on the first pass and less on second pass but after the 3rd pass the sound allready recorded stays practically the same. The amazing is that hiss does not increase after the usual to all tape recording 1st pass. Does this suggest unlimited number of overdubs on the same track without increase of hiss noise? Track 3 and 4 where used as guide tracks listening by headphones and 1 and 2 where overwritten many times with great quality sound. An example may be uploaded soon on Vicky Moriton youtube channel. See also Phil Ramone recording interview on It's My Party double tracking Leslie Gore on the same track, Mike Oldfield making his demo of Tubular Bells by disabling the effect of the erase head on a Bang and Olyfsen reel to reel tape recorder.

Is sea water important for teeth health?

At your risk, this is not a medical advice. Personal experience says yes, after washing teeth for some years with sea water. An explnation seems to be the fact that salted water removes water from microbe cells by osmosis (see wikipedia salted fish article). Entropy at work.

On equalising a small speaker so that it sounds correct to listener's brain

We know (i may be paraphrasing it) from Dr. Harry Olson experiments that octaves missing must be symentrical on both sides of the frequency spectrum for balanced sound,(Music, Physics and Engineering - Olson). On listening tests of the Pleiades Linoleum Auratone 5C speaker Vicky pointed out how well it sounds with grandma's Eleni JVC 9425W FM radio cassette recorder, which has an amplifier that bass boosts roughly below 100+ Hz to compensate for the somewhat small speaker, cabinet. Inside childhood's Sony DR-S5 8 ohm headphones was found a clever treble cut R, RC filter that is very similar to RIAA bass boost networks. It works as speaker bass boost and sounds great, see previous posts.

Bravo to Vicky for discovering the need to bass boost the signal before feeding the Pleiades Linoleum Auratone type 5C speaker

One way to do this is mid, treble cut between amplifier and speaker. Current experimental values for a very nice balanced sound with great articulate, deep bass is (taking jumper cables into account), (amp now sees 12.8ohms instead of 4ohms): A series resistor of 10ohms. A (2.3ohm resistor in series with 220uF capacitor) shunt to jumper cables, cables feeding Tesla drive unit. Signal path: The Corrs MTV unpluged CD - Sony CD Walkman line out - Naim Nait 2 recapped with Elna magenta colored before ROHS capacitors - passive frequency subtractive network - Pleiades Linoleum Auratone type 5C speaker

Eqing the Pleiades Linoleum Auratone 5c type speaker/ Recording simple songs at SNFCC??

Inspired by the Sony DR-S5 headphones and RIAA bass boost networks. A series resistor between amplifier and speaker, a series resistor capacitor network in parallel with speaker. The electrolytic capacitor can be correctly polarised if a single ended single transistor is connected directly to speaker without an output transformer./Contacted nlg.gr for request to use its studios. Before this Irida had been recorded at the outdoors SingForHope.org Yamaha piano, (Vicky Moriton youtube channel), outdoors always can sound nice as there are no nearby thousands of reflections. Recorded some vocals at Pleiades lab with 2 out of phase omnis, singing on one (the brilllianr Lou Burroughs trick), here with a Shure VP64 and a great Shure Radio Shack Realistic mic? Great sound also on VP64 with a Pleiades green filter (130ohms, 20mH) connected to the input of Sony TC-D5M (ie output of mic) using whispering voice. Recording outdoors too, recording at the forest, huge sound.