Amir and Blind Testing

Look, you didn't even know the bureau of standards has been defunct for 35 years. Don't try to invent a backstory at this point in some questionable call to authority with made up qualifications. You didn't even know what NIST was till I put it in a post. If you were truly an engineering manager involved with metrology, you would know this. You did not.

You don't know what would be calibrated on a spectrum analyzer, let alone an audio one, or even how it would be relevant to the information being presented, most of which is differential in which case, calibration is effectively of no meaning. Whether one item is 1 and the other is 1.1, or one is 1.1, and the other is 1.21 is not relevant in a differential comparison. Again, if you were an metrology expert, you would know this. Similarly, whether something is 1.000KHz or 1.001KHz in audio would not be important. If it was, we could never use turntables.

On top of that, many instruments today incorporate self calibration features. In a device with an independent generator and recorder, if the recorded result matches the expected generator output, then you can be rather confident of the calibration.

tonywinga

193 posts

04-16-2022 at 01:08pm 

Wow, another self proclaimed expert.  Spectrum and frequency analyzers do need to be calibrated.  Since I was an Engineering Manager for several years with one of my responsibilities being test equipment design, calibration and repair in a major Aerospace Company I know that first hand.  All test equipment should be traceable back to the Bureau of Standards or NIST for serious test work or analysis.

@mahgister 

I understood quite clearly what you posted. You without any lack of clarity accused the users of the Audio Science site of ignorance wrt the need for room acoustic treatment. I will post it again.

Their common point is a total ignborance of acoustic condition because they need electrical tools they dont need to tune a room... All rooms are equal for their activities....

This is in my experience and to anyone who happens to visit there patently false.

I expect you went there and tried to tell some experts in acoustics how to do acoustics, and it was not well received. Based on your posts, it is likely you made some claims wrt what you could accomplish by ear alone that from my own audio journey is not impossible.

Audiophiles can't have it both ways. You have Tony complaining that a device was not recently calibrated to a 35 year defunct Bureau of Measurements meanwhile almost no companies in this industry supply any measurements let alone NIST traceable while you claim that your ears are "accurate" enough. Surely you see the irreconcilable issue here?

deludedaudiophile, you seem very defensive about this topic. I get the impression that you manufacture a product and are trying to rationalize not using certified or calibrated test equipment. That would be sloppy work indeed. Any manufacturer publishing specifications for their product should be backing up those specs with data from certified, calibrated instrumentation. If not, they could find themselves in hot water I would think if not able to defend their published claims.

Sorry but the way a piece of gear could be evaluated is in a specific ROOM ONLY ... Not by an electrical partial chosen set of measures ONLY ...CORRELATION BETWEEN MEASURES AND ROOM is NECESSARY ...

That was my point...

I know perfectly well that there is all kind of people in this site, even acousticians...

But claiming that a piece of gear is "bad" without listening it in a controlled acoustic is BULLSHIT...And this is what Amir does often and his disciples who attack "deluded audiophile" if you know what i means...

And it is perfectly possible to tune a room by ears, i have done it to my satisfaction AT NO COST...It is not perfect but it works...Helmholtz did it before me and the Egyptian...

I dont need any headphones now nor any upgrade nor any advice by fools who think measuring some aspects of a dac without listening to it is the way to chose one...

Then read me right... Iam not a deluded audiophile nor a deluded measuring fool...

If there exist only 2 cases in your audio brain; deluded audiophile and measuring fool, add a third one for me...call it CORRELATING EARS AND MEASURES guy...

😁😊

I understood quite clearly what you posted. You without any lack of clarity accused the users of the Audio Science site of ignorance wrt the need for room acoustic treatment. I will post it again.

Their common point is a total ignborance of acoustic condition because they need electrical tools they dont need to tune a room... All rooms are equal for their activities....

By the way i dont pretend to teach their job to acoustician...

I pretend to have been able to tune my room..

Then dont put in my mouth what serve your goal...

And in case you dont know it, SMALL ROOM acoustic is a recent field in acoustic science investigations ... The market for small room acoustic is few decades old...Amphitheater exist for millenia...

i dont pretend to know anything, i only experimented 2 years non stop in my room...

And my room beat my 8 headphones... it is not perfect but it is enough for me..

And by the way the best acoustician in the world are on the net with their articles and books... They are not in the ASR site...And if they are there. did they contradict the idiotic way to judge a piece of gear by numbers alone ? Inform me about that i dont know... 😊

How do you think i learn to tune my room? By consulting acoustician articles on the internet...And creating my own experiments...

Serious Acousticians are not dwelling in audiophile forum for sure and not in your ASR site either , they WORK ...

Read my post right please before categorizing me in the "deluded audiophile "box your avatar name suggest....

I expect you went there and tried to tell some experts in acoustics how to do acoustics, and it was not well received.