Master Thread: Are measurements Everything or Nothing?

[Amir-Hossein]

Pkane
Please stop
It is better to focus on the subject and read the PDF
Thank you

 

[pkane]

Pkane
Please stop
It is better to focus on subject and read the PDF
Thank you

It took me about 2 minutes to scan the PDF -- I've not only studied this area but implemented both, measurement and correction methods for non-linear systems.... using music. I'm very familiar with the subject, so if you want to continue to argue, then please use something that is actually meaningful in this context, thank you.

 

[Sokel]

Pkane
Please stop
It is better to focus on the subject and read the PDF
Thank you

Amir-Hossein yes,tell him to stop,his DeltaWave, Multitone Analyzer,PKHarmonic, Earful and DISTORT needs debugging and we keep asking him for more features.
His time is more valuable than answering to silly claims

 

[Amir-Hossein]

Amir-Hossein yes,tell him to stop,his DeltaWave, Multitone Analyzer,PKHarmonic, Earful and DISTORT needs debugging and we keep asking him for more features.
His time is more valuable than answering to silly claims

Absolutely nonsense

If you have no thing to say about this subject please stop posting here

 

[Geert]

If you have no thing to say about this subject please stop posting here

When can we expect something meaningful from you, except for "it's complex"? Can you give us some examples of non linearity issues in for example DAC's or amplifiers, which are audible but don't show up in measurements like frequency response, distortion, noise and phase response? How common are these issues, and which measurements do you suggest to capture this information?

What about an answer to the question what we're missing when performing a null test?

 

[Feelas]

Audio systems and music signal are complex.

if simple measurements can not answer our questions then we should go for more accurate more complex measurements to get our answers.

I believe in measurements.
Audio equipments are Nonlinear systems
Music signal is not simple tone
Human hearing is not simple linear system

But you do understand that it has been shown some times that music's wideband spectrum may cause masking of distortion under the musical signal... right?

Also, author of the thesis writes EXACTLY this:
the only assumption for using the proposed identification method is to consider the system under test as a black box with single input x[n] and single output y[n].
to say about his own method.

 

[Sokel]

Absolutely nonsense

If you have no thing to say about this subject please stop posting here

LOL

 

[dc655321]

This thread is basically a honey pot for trolls. It’s been great for ID’ing Ignore List candidates

 

[Amir-Hossein]

I told before in my first post that "Time domain measurement and scanning" of signal when audio system is playing music in room.

 

[Feelas]

I told before in my first post that "Time domain measurement and scanning" of signal when audio system is playing music in room.

Please elaborate how that would change anything, apart from taking the task from "hard' to "utterly impossible to do repeatably"? In any case, guys have brought up null-testing above, if null-tests don't show anything then how come you believe in difference between signals? Please talk this through, too, if you want to be treated seriously.

 

[Sokel]

I told before in my first post that "Time domain measurement and scanning" of signal when audio system is playing music in room.

Come on,don't be ashamed to admit that you want to be a mystery around so you can go on and post that you heard improvements with every mambo-jumbo snake oil is around audio.
You're not the only one.

 

[irontortoise]

Audio is bound by physics, therefore can (and should!) be measured. The devices reproducing those sounds, also bound by physics, can therefore be measured and quantified. The only part that cannot be 100% accurately measured is your personal response to that reproduction and based on past studies, a very close general approximation can be made. That is at least how I try to approach it now that I understand better. Leave the "veils," and other marketing terms that cannot be measured to philosophers, theologians, and Zak Bagans.

 

[Geert]

I told before in my first post that "Time domain measurement and scanning" of signal when audio system is playing music in room

In that first post you gave digital cables as an example. You don't think it's sufficient to perform a null test using the output of the DAC or the amplifier? Is my understanding correct that you instead want to record the sound in the room? If so, how can that sound differ when a null test of the DAC output doesn't show any difference? Please clarify if this is not what you meant.

 

[Amir-Hossein]

In that first post you gave digital cables as an example. You don't think it's sufficient to perform a null test using the output of the DAC or the amplifier? Is my understanding correct that you instead want to record the sound in the room? If so, how can that sound differ when a null test of the DAC output doesn't show any difference? Please clarify if this is not what you meant.

Geert
What i suggested is time domain measuring in real condition , imagine audio system is playing music in your room at moderate level and you scan/record signal (from speaker by microphone or from speaker terminal voltage) and compare two signals (null test) in computer.

In this method we have not 100% control to have equal test condition but overally i think this is better method.

 

[Amir-Hossein]

Sokel
I have a TAD Reference System D600/C600/M700/R1 + Skogrand Cables totally 570.000$
In my system i had many blind listening tests and i believe a properly setup (good AC quality, good speaker placement, good acoustic) TAD system could show difference of cables.

 

[BDWoody]

I think you absolutely do not know anything about non-linear systems.
Please upgrade your knowledge before spreading nonsense ideas.

You get a time out.

Do more reading.

 

[pkane]

You get a time out.

Do more reading.

By the way, he’s apparently an audio dealer in Iran for all the equipment, including these amazing Skogrand cables he mentions

Amir Audio Ltd

 

[Ken1951]

You get a time out.

Do more reading.

Thank you!

 

[Feelas]

By the way, he’s apparently an audio dealer in Iran for all the equipment, including these amazing Skogrand cables he mentions

Amir Audio Ltd

This one I didn't expect, makes sense. That's sad.

 

[Blumlein 88]

This one I didn't expect, makes sense. That's sad.

Maybe the change needed is to measure components like they are a green box.

Amir doesn't measure for SMR............ signal to money ratio.