Please don 't infer from my posts that I imagine anyone is lying. A lie is only a lie if the teller is aware of the untruth. We are talking self deception here, or group deception. Shared ad nauseam.
yes, my words not yours.
I personally, dont subscribe to that line of thinking. Can people's minds be manipulated. Sure happens all the time. Just watch the news in different countries on the same subject. On the other hand much of the differences are not lies nor deception but different priorities and cultural bias. Religion is in there somewhere. But thats sacred and cant talk about it here.
Basically, if many people hear some characteristic then I trust it to be true for them. The medical industry has shown clearly how variable people are. so, even if I havent experienced it myself. ... its accepted Until proven otherwise. or if my experience is very different, I will go with my experience.
THx-RNMarsh
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yes. But it has to be proven it is a placebo affect. Otherwise...accepted.
THx-RNMarsh
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Yah you presumed correctly.....
I really don’t see a problem with spending three or four grand a year on audio......if it’s a passion and it exudes joy then wth.
Some people spend more than that on speaker cables!
Plus I recoup some of the losses when I sell something I’m done with or upgraded from.
I wonder what the average audio hobbyist spends in a year?
Haha, I see what you were saying now, I'm sure you Americans speak a different language 😀
No, I am not.
Do you really believe amp technology is mature? I can pull the cover off almost any amp and show where the designer failed to follow EMC practice.
Interconnection between amps, preamps, DACs, ground loop disasters. Even balanced is sometimes messed up.
I'm just trying to answer your questions. Sorry if it requires lots of words, but I find brevity sometimes allows for misinterpretation or misquoting.
Yes, plenty of times, and with vigor. However, I never consider posting challenges to that stuff just to satisfy you. At DIY audio, so many others challenge those things that it's not necessary to chime in.
You seem intent on protecting us from the bad people selling something (although you've not made clear who or what that is. I do believe this forum is not a target market for those bad guys.
Jn
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Hans,
Thanks for the effort on the cymbal stuff.
The problem with using that file is it is not possible to really see what is going on, only that the Gibbs implies something is removed.
Test waveforms are required. I created a sine that I modulate, the modulation designed to push sidebands over the filter cut. I made a 20 k and modulated exponential decay, the start of the decay almost exactly identical to a 2.5 k Cosine modulation.
I will also time mirror it, so it starts slow, then climbs at high rate. The intent is to watch lack of Gibbs until the rate of the modulation pushes sidebands over filter cutoff.
I designed it for samples every microsecond, and it's excel.
If you or Scott can convert to a wave file, or if you would like me to change rate, ask and I'll do it.
Meanwhile, Tuesday I can plop a jpg of the waveform.
Jn
Thanks for the effort on the cymbal stuff.
The problem with using that file is it is not possible to really see what is going on, only that the Gibbs implies something is removed.
Test waveforms are required. I created a sine that I modulate, the modulation designed to push sidebands over the filter cut. I made a 20 k and modulated exponential decay, the start of the decay almost exactly identical to a 2.5 k Cosine modulation.
I will also time mirror it, so it starts slow, then climbs at high rate. The intent is to watch lack of Gibbs until the rate of the modulation pushes sidebands over filter cutoff.
I designed it for samples every microsecond, and it's excel.
If you or Scott can convert to a wave file, or if you would like me to change rate, ask and I'll do it.
Meanwhile, Tuesday I can plop a jpg of the waveform.
Jn
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I keep hoping this gets some discussion. Well differential receivers really.
But you must be careful. If the word gets out that top audio designers don't understand EMC civilisation as we know it could be toppled 😛
Just because audio designers are incompetent does not mean that the technology is not mature. How many of them even have their products tested for compliance?
When something is working, how important the word you put on it.
I a pill cure my actual influenza better than the inefficient antibiotic that tires-me since a week, I don't care if its name on the prescription is "Placebo".
Nobody is totally incompetent, nobody is totally competent (apart SYN08 evaluating himself, of course).
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Amp technology is nothing more than electronics technology, of one of the simplest kind. However, any audio amp implementation has, for all practical purposes (in particular cost control), to be subject of many corner cuts and trade offs. How deep are these trade offs going, and how compromised the final implementation is, has nothing to do with the technology maturity level. Imagine an audio amplifier developed at the technology standards of high performance military/space communication electronics, costing 1 mil a pop, what good will that do?
The question is not about the technology maturity but about where and how deep to cut the corners so that the end result is good and cost effective. And here's where the trouble starts, since the relationship between "good" and "cost effective" is non linear and ultimately not a matter of a hard technology metric only.
Sorry, I was not referring to external emissions and should have explained better. Serves me right for worrying about wordcount.😉
I refer to proper internal layout and internal control of currents. One good example would be output rails. Worst case would be all the positive rail pass elements on one side of the chassis, negative on the other. The magfield splash in the chassis will be physically different for each polarity current.
Best would be pass elements interleaved with the return current through the interleave back to power ground.
Jn
Just need the formula, the 1MHz fs does not work well with some audio software.
We once had a tenant who did acupuncture for dogs. Some of the customers (owners) belonged in a reality show.
Sound quality claim of goop applied DAC that you listened to with Markw4, live vs replayed sound comparison through your makeshift comparison method approved by you, sound accuracy claim as it gets closer to 20KHz.
Short memory span, eh. Or is that willful too?
Not to mention that Excel is severely limited in FP precision Floating-point arithmetic may give inaccurate result in Excel - Office | Microsoft Docs making any attempt to 24 bit or more FFT in Excel (there is a function for that) a bad joke.
So you are trying to say that audio amp technology isn't a matured technology because you are aware of audible sound quality variations which still cannot be overcome today and the audibly transparent hi-fi amp has not been produced?
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