I'll give up picking on Jakob2 when I'll see his FIRST "no peeking" TEST PLAN, designed to identify whatever (of his choice) extraordinary audio related claim. That, rather than endlessly nitpicking on others attempts to create and implement such a plan, or at best providing vague suggestions.
Because we are at nitpicking, this is what I posted:
Let me correct the above:
"entirely dedicated to put down any attempt to rely on ABX for identification, or preference tests, disregarding how carefully and throughout they are designed"
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I don't.
Understood. For some people and in some situations there is likely not a noticeable difference. I would be surprised if that were not the case. I am more interested in other cases, usually.
Yes. This is the first rule.
The second one could be claims for a solution to cure a problem ... that doesn't exist or that doesn't matter.
I can’t comment on the digital RIAA thing.
I’m simply saying it’s easy enough to design an RIAA with enough headroom to enable it to deal with virtually any eventuality.
I don’t understand how you can clip a pop or crackle and not have it generate more harmonics and garbage (talking about analog RIAA).
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Is that all?
This is DIYaudio, that's why I think the tests that Pavel did were good because they allowed audience participation, were accessible and required common sense only, not an in-depth knowledge of the science of statistics etc.....
Wrt "reverb tails" i had a faint memory of a description of perceptable noise effects fairly down in level but could not remember who wrote it and where i had read about it; actually it was Paul Frindle describing an event from his time at Sony Oxford (although i think he gave a more detailed description of the effect elsewhere):
"It turns out that under practical conditions we can hear much much more than the accepted models of our hearing would suggest, much much more than I would have ever predicted 20 years ago.. Our ability to differentiate between sounds and make sense of them is nothing short of astounding!
For instance an earlier post (by timlloyd) mentions the ability to hear the difference between correlated and uncorrelated dither at -93dB. As absurd as this may seem logically speaking, he is actually perfectly correct - under some circumstances you really can!!
We had to re-engineer great swathes of dither processing in the OXF-R3 to lose just this effect even using what I thought were text book mathematically un-correlated noise sources. Moreover they were not only producing effective noise at around -110dB down (17dB better than CD) - they were also being randomised yet one more time by each converter!! How much correlation was there? Virtually none!
But this effect was first pointed out and demonstrated to me by a mastering engineer, in his own live studio, playing an analogue taped music (with no more than 70dB SNR) through an early OXF-R3 converter rack at normal listening levels. When he first suggested he could hear something (wasn't sure what) I couldn't believe him. When I heard it too and eventually found out the cause I was completely astounded!! I would have never ever believed this possible by any stretch of the imagination. But I could simulate it back in the lab and prove the cause - and ultimately fix it. Very humbling stuff indeed!
Trying to measure correlation (that we might hear) at this level directly is virtually impossible. In the end we made a processing model that did this reliably which could be varied in the related parameters, and designed the eventual system based on what I was able to hear or not hear after sitting there for days on end with different deliberately revealing signals - and then made the final design several time better than that for safety. That was the best (and only effective) science we could bring to bear on the problem! Theorists would (and actually did) laugh. "
I have 0.23 mm solder, bought at SEGOR-electronics GmbH. They used to be in my neighborhood,
it's also available elsewhere.
That makes the difference. And the Metcal Ultrafine tip.
I don't know if the deep link works : < SEGOR-electronics GmbH >
LZ 0,23-100
SMD-Lötzinn 0,23mm 100g
Sn60Pb38Cu2 FSW26(2,5%)
100 g is enough for years since it does not end up in the solder wick.
regards, Gerhard
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Who everyone, .01% of the population? Perfectly correct is an extreme statement, you are obligated to provide evidence just as those who claim the opposite "perfectly". I assume at the minimum these claims are based on a rigid protocol with the required positive and negative controls which you demand of the rest of us. At least look at the words in your post you present this data as fact.
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Markw4 answered by a good question (Don't know why his message is not there any more) which said (in substance) "For who ?"
You were right. Too controversial, could imply listening tests ;-)
Even if it costs him $1,000,000 and a few years of his life? Otherwise, shutup? Or is it enough to preface the story with, "what follows is anecdotal.." as if that weren't clear.
By the way, for gerhard's last post, about solder and such, is he obligated to provide proof as much as those who may claim otherwise?
Wasn't that clear, what follows is anecdotal, from all sides I have no problem with that? "You really can" is a statement of fact. There is anecdotal evidence that some people think they can under some circumstances is more accurate.
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When Jakob2 said '...correct,' I thought he meant that some people under some circumstances could hear it. Not necessarily everyone.
Sorry, it is often much easier for us humans to understand each other under different and better conditions, IMHO.
Why don't you guys use a hot air tool for soldering fine pitch SMDs? Works great for DFNs as well. I use a tipped iron only for tinning the PCB pads before the hot air reflow. Reworking is a breeze.
The proof is easily done. Go to the web site, type in what you want, add your
credit card number and 3 days later you'll have the proof in your hands.
I must admit that my post is somewhat exotic in this thread. It contains
facts and traces of diy, no unproved claims and namedropping.
My .sig aplies here.
I offered proof that more people could prove they could hear small distortion, if they had an FFT analyzer, and a good sabre dac with register level access.
Same kind of thing as you suggest, 'you can easily prove it yourself,' type of claim. Most people won't do it, as you probably know. Just like most who solder SMD with an iron won't bother with hot air. All we can do when we offer tips is hope that maybe someone will try something new.
I do have a hot air station, a temp-controlled plate and also a vapor-phase
solder machine. But for 95% of the time I need only the Metcal MX5200.
When I got it finally, I was really sour that I hadn'd bought it 10 years earlier.
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