John Curl's Blowtorch preamplifier part III

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No, it's simply that frequency cannot exist without time so how can someone be exposed to one without the other?

Different representation of the same thing (frequency domain and time domain). One just has to be educated and experienced to understand both. However this forum pub-like discussion of a group of amateurs would hardly help to better understanding and hardly makes any sense, except for wasting of time.
 
Different representation of the same thing (frequency domain and time domain). One just has to be educated and experienced to understand both.
DF96 statement makes no sense to me as we can't "experience" just the frequency domain - maybe you have some suggestion how this can be achieved?
"If our early experiences in life were mainly frequency domain instead of time domain we might be having the opposite argument: you would be saying that the sine waves were the only reality, that a time-based waveform was just a model, and that our ears do not use Inverse FFT."​

However this forum pub-like discussion of a group of amateurs would hardly help to better understanding and hardly makes any sense, except for wasting of time.
And yet you waste your time here while complaining about wasting time here? 🙂
 
Isn't that what this whole thread is about - your post is a case in point?
Irony is always .... ironic 😀
Really I mean when people say words to the effect of "shut up and go away" which Dan has done here, (which is fine because it's on a public forum and the hypocrisy is evident) and in PM which I consider beyond the pale. Disagreeing is another thing entirely IMHO 🙂
 
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I thought the original disagreement was over whether music consists of sinewaves? Are you now changing the topic of conversation?

I missed this originally, sorry
Nope, I said that at the eardrum, on a moment to moment basis, it's just compression & rarefaction of air molecules that hits, & to auditory perception, it's not sinewaves

I'll repeat my question - Where are the sinewaves in random noise?
 
From the current online version of Encyclopaedia Britannica:
Sound - Noise | Britannica.com

"The ear actually functions as a type of Fourier analysis device, with the mechanism of the inner ear converting mechanical waves into electrical impulses that describe the intensity of the sound as a function of frequency."
"The EB says it, I believe it, that settles it!"

The ear as a Fourier transform is more of an analogy that happens to (mostly) work.
The ear is a large number of resonant filters with each one activating a nerve ending. The frequency detection spacing is geometric, rather than (as in a DFT/FFT) linear. It's easy to hear the difference between 60Hz and 61Hz, but a lot harder to hear the difference between 1000Hz and 1001Hz.
And:
"The ear is responsive to the periodicity of a wave, so that it will hear the frequency of a complex wave as that of the fundamental whether or not the fundamental is actually present as a component in the wave, although the wave will have a different timbre than it would were the fundamental actually present."
People (and encyclopedias) say "the ear" when discussing this type of thing but I have no doubt it's the hearing area of the brain that recreates and "hears" a fundamental when only the harmonics exist.
 
How do you mean "other than a source identifier"?

Mapping the source to compare with the processed/amplified result.

I’m assuming that’s a real world application?

Edit..... I just watched the u tube hiten posted for spectral audio editing that is exactly what I meant by ‘real world application’

Now if they could get all that into the dsp processing real time.....that’d be something!
 
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Random noise is made up of lots and lots of tiny little sine waves all fighting with each other for attention.

I hope that is clear.

The most mathematically beautiful derivation of sqrt(2qI) for the noise of a current I is based on Fourier theory.

OK, thanks

Auditory perception doesn't break down this noise into lots & lots of tiny sinewaves - far, far too much inefficiency in this approach for biological processes - if anything defines biological development of the senses, it's efficiency using the resources available. In fact there is research & evidence that it processes noise completely differently - "evidence that the auditory system summarizes the temporal details of sounds using time-averaged statistics"

This applies to sound texture & is thought to be part of the techniques used by auditory perception in processing all sound.
Summary statistics in auditory perception
 
Hi Richard,

I think Scott has nailed it with his comment

"since a difference is often perceived as an improvement, it would be more useful to do the comparison again"

I all the years I have been working with audiophiles, this is probably the most significant error made and hence the endless quest for improvement by most audiophiles. The lack of an established base line and the lack of repetitive comparisons to establish the improvement or lack of. Most audiophiles totally ignore this fact ad end up chasing their tails.

A sad state of affairs but governed by human nature.

Jam
 
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