'Life Above 20kh' Research Paper, Harmonics (Overtones)

movement of instrument/mouth, air, microphone, cutting stylus, moving magnetic material on tape, captured/played back by movement

the ’timing’ is ’not quite right’ when you add the step of direct conversion of movement or conversion of captured movement to digits, numbers, good numbers, more numbers, a heck of a lotta more numbers, then read and convert those whole lotta numbers back to movement.

what the heck is loz rez, high rez, super high rez all about?

between two ears alone, on the exact same pulsed signal, the ears, as a pair, have a discernment level that goes well beyond 100khz, with regard to timing resolution, in stereoscopic placement of a ghost stereo signal. (it’s all reproduction and fakery)

and, in that, it must occur at the exact correct microsecond and at the exact correct level, with respect to the two signals coming out of the speaker pair.

to do so, requires an approximate 250khz plus sampling rate, and zero jitter of any kind. at a signal bit depth of at least 20 bits.

currently, we are incapable of recreating/building this. (Jitter)

never mind the sound of an orchestra in the same set-up.

there is additionally other fundamental problems with digital and BJT and Fet transistors.

V-Fet and SIT transistors are the only ones that are useful for human hearing discernment, when it comes to peak functions, and then there is tubes, which are also correct in the critical to human areas of signal reproduction. Analog tape and LP are also correct. Doug sax’s mastering system, BTW, was all tube. For this reason.

when digital was conceived and brought into the world, none of this was known or considered. Digital did some of the most critical (to human hearing) things wrong.... as it was, for the most part.. engineered--- not heard. Big mistake.

I found the 'hangover' effect interesting (3rd paragraph).

X. Significance of the results

Given the existence of musical-instrument energy above 20 kilohertz, it is natural to ask whether the energy matters to human perception or music recording. The common view is that energy above 20 kHz does not matter, but AES preprint 3207 by Oohashi et al. claims that reproduced sound above 26 kHz "induces activation of alpha-EEG (electroencephalogram) rhythms that persist in the absence of high frequency stimulation, and can affect perception of sound quality." [4]

      Oohashi and his colleagues recorded gamelan to a bandwidth of 60 kHz, and played back the recording to listeners through a speaker system with an extra tweeter for the range above 26 kHz. This tweeter was driven by its own amplifier, and the 26 kHz electronic crossover before the amplifier used steep filters. The experimenters found that the listeners' EEGs and their subjective ratings of the sound quality were affected by whether this "ultra-tweeter" was on or off, even though the listeners explicitly denied that the reproduced sound was affected by the ultra-tweeter, and also denied, when presented with the ultrasonics alone, that any sound at all was being played.

      From the fact that changes in subjects' EEGs "persist in the absence of high frequency stimulation," Oohashi and his colleagues infer that in audio comparisons, a substantial silent period is required between successive samples to avoid the second evaluation's being corrupted by "hangover" of reaction to the first.

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me: what's a 'substantial time period'? silent for how long??? 

btw, I find many people can not even stop talking for the length of 1 song.

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      The preprint gives photos of EEG results for only three of sixteen subjects. I hope that more will be published.

In a paper published in Science, Lenhardt et al. report that "bone-conducted ultrasonic hearing has been found capable of supporting frequency discrimination and speech detection in normal, older hearing-impaired, and profoundly deaf human subjects." [5] They speculate that the saccule may be involved, this being "an otolithic organ that responds to acceleration and gravity and may be responsible for transduction of sound after destruction of the cochlea," and they further point out that the saccule has neural cross-connections with the cochlea. [6]

Even if we assume that air-conducted ultrasound does not affect direct perception of live sound, it might still affect us indirectly through interfering with the recording process. Every recording engineer knows that speech sibilants (Figure 10), jangling key rings (Figure 15), and muted trumpets (Figures 1 to 3) can expose problems in recording equipment. If the problems come from energy below 20 kHz, then the recording engineer simply needs better equipment. But if the problems prove to come from the energy beyond 20 kHz, then what's needed is either filtering, which is difficult to carry out without sonically harmful side effects; or wider bandwidth in the entire recording chain, including the storage medium; or a combination of the two.
      On the other hand, if the assumption of the previous paragraph be wrong — if it is determined that sound components beyond 20 kHz do matter to human musical perception and pleasure — then for highest fidelity, the option of filtering would have to be rejected, and recording chains and storage media of wider bandwidth would be needed.

Dear friends: Many years ago as many as my very old ADS L2030 speakers I learned about the importance of our clothes fabric kind.

In those times I looked and read it about a top speaker performer that was using long hair wool inside its boxes for speaker dampening.

My ADS came with fiber glass inside for that same " action "/dampening and I took the choice to modified it by changing all those, even toxic/cancer , glass fiber by long hair wool ( I think I used around 50kg on each one of these really big speakers. ) and that was a great move for the quality performance level of those speakers and I really mean it. As if the L2030 were new/different speakers.

From those times I left to use synthetic fabric clothes and only natural fabric/fibers as: wool, cotton, silk, linen, leather and the like.

You can make the test in this topic too: put you synthetic clothes and listen your system and then change those synthetic clothes by all natural fiber clothes and you must hear the differences for the better.

That’s whay too the furniture or seat couch/chair in your room/system must be made it only by natural fibers.

Returning to harmonics I have to say that the natural color that has the live MUSIC is " painted " by all developed harmonics, this is exactly what we are hearing in live events or in our room/system.
There is why the importance of the electronics/speakers characteristics.

R.

Dear @teo_audio : " which are also correct in the critical to human areas of signal reproduction "

there are not a true critical areas of signal reproduction. According that link and my posts here and elsewhere everything is critical from 16hz to over 150khz.
All harmonics modulates what we are " hearing " and puts the natural color MUSIC has.

"" requires an approximate 250khz plus sampling rate, and zero jitter of any kind. at a signal bit depth of at least 20 bits.

currently, we are incapable of recreating/building this. (Jitter) ""

Well today DACs comes with 32bits/384 characterisitcs, way higher than what we need.

Jitter?, LP is way worst than digital about because the cartridge stylus tip can’t follows the grooves modulations with continuity. The stylus tip is jumping at each great obstacle name it groove. This is worst that anything you imagine happens through digital.
Along that exist a tracking error in pivoted tonearms that impedes to pick up what is in the recording and where do you leave all the tonearm/cartridge/LP surface/TT developed resonances/distortions/noises added for that terrible inverse RIAA eq and all those additional gain stages in the electronics where the cartridge signal must pass thorugh ! ! !



All those is superior to today digital alternative?



""" Digital did some of the most critical (to human hearing) things wrong.. """

please tell me a computer or any digital instrument/device that does not use BITS. In which world are you living?

R.