John Curl's Blowtorch preamplifier part III

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Psychological evaluation indicated that the subjects felt the sound containing an HFC to be more pleasant than the same sound lacking an HFC.
These results suggest the existence of a previously unrecognized response to complex sound containing particular types of high frequencies above the audible range.
We term this phenomenon the “hypersonic effect.”


Why do we need Pet-scans and EEGs if added ultrasonics result in a more "pleasant" sound.
The listener seemed to have been aware of the added HFC, so why can't the "feeling pleasant", because now he got the full treatment, be seen as the cause of the changed Pet/EEG instead of concluding that he "heard" something.
What would have happened to Pet/EEG with and without showing a Playmate of the month to exclude this emotional effect, seriously !

One last remark: the ultra full range speaker that I mentioned in, John Curl's Blowtorch preamplifier part III, could very well be an active system to keep the signals offered to the speakers as pure as possible and the overall FR as flat as possible. But stick to the rule of reducing the amount of variables to the minimum, in this case to just one.

Hans

It should also be noted that fMRI data should be taken with a really healthy dose of salt. It's a field of study worth studying for a "how to spurious correlate". It might have cleaned up its act since then, but certainly most early fMRI studies should be treated with the greatest of incredulity.

Can we trust statistics in fMRI studies? | PLOS Neuroscience Community
 
No, but I claim you are looking for a differentiator, aka a "secret sauce", for your AK4499 DAC development. A known obsession of all "audio professionals".

Yep, if he had the ability to design his own converter from scratch, he would tell you how AK4499 sucks and his discrete design was best.

Very common as you observed. Lots of hate on op-amps from the discrete crowd, no matter how it performs.
 
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