Double blind test- over a month- could this be a reliable test for any equipment?


I am aware there are lots of debate about the merit of the double-blind test.Reading lots of articles online makes me feel overwhelmed and also confusing- you could have a totally opposite view of the same piece of equipment and system.
msnpassion

Showing 6 responses by millercarbon

If I were forced to choose between the double-blinders and the bat-biter, I think I'll go with Ozzy. Not that it matters, but one sounds a lot more entertaining.
It is very common for those who are immature, inept and ineffective, especially in writing, to think they are funny, entertaining, or amusing while trolling, boring, and annoying. It is odd to think, conjecture, or contemplate how anyone unable, unwilling, and incapable of anything other than one, no two, no three adjectives strung between, around, and betwixt conjuctive clauses could have anything to say that anyone man, woman, or child, would ever want to know.
Our perfect auditory recall period is about 10sec. If there is a minute difference you didn’t pick up immediately, it’s impossible for you to notice a change the next day. If I changed the volume of your setup by 2dB, I doubt a single person on this forum could notice it if they didn’t listen to the change for a full day, whereas if immediatly listening, the change is easily audible.

You noticing differences is simply noticing things that already existed, but were simply not overtly audible. I could play you a song 5 times, and you would likely hear some change if I told you there was one.


Fascinating how you know what everyone else is able to hear. Especially since, according to what you wrote, you aren't able to remember anything more than 10 seconds.

My system sounds a whole lot better right after spraying anti-static and demagnetizing. Then within half an hour or so it needs to be repeated. This wasn't something anyone told me. This was something I learned by listening. And being able to remember more than 10 seconds.

I had some friends over one time. This guy didn't believe any of this either. He brought his wife and I told him, have her bring her favorite CD. That's all. I played her music and then asked if there was one track on her CD she wouldn't mind hearing twice. No other clue. They listened and when the track was done I stepped out, walked to the garage, flipped all the breakers off, came back and played the track again. They had no idea what was going on. Immediately when the song was over the wife exclaimed, "What did you do??? It sounded so much better!!!" I didn't even ask, she just blurted it out.

That was a lot more than 10 seconds.

Another time the same guy, like I said he just refused to believe. So when no one is looking he moves the chair a bit to one side. Because I had told him how critical symmetry is to imaging, so he's gonna have this big laugh I guess. Only, I happened to sit there to listen and set the volume for the next person. Just sitting and listening I noticed right away something was wrong. Checked the balance, nope. So either the chair or one or both speakers got moved. In no time flat, and the guy was watching and couldn't believe it, I had the chair back where it belonged. Entirely from listening. And remembering. For a whole lot longer than 10 seconds.

I could go on and on. Parties swapping power cords for a whole room full of people. Takes a lot more than 10 seconds to swap a power cord. Everyone hears the difference.

Heck, forget audio. Ask any mom if she knows what her baby sounds like. They remember EXACTLY what sound they make.

Lewis Hamilton, you can bet he remembers how his car sounds from one lap to the next.

10 seconds. Right.
Well, no, that's the point. Its not reliable. In fact its been proven not to work. This after all was the basis for some of the early codecs that were claimed to be scientifically tested identical sounding before everyone who actually heard them said hey no its crap.

At the very least, if you can't stand to be doing it for long that alone ought to be enough to know there's something wrong. 


I once read that a/b-ing by switching back and forth during a track was the quickest way to missread true differences (as opposed to whole track with A, then whole track with B). And this was my experience...but a few people on another forum told me I was flat wrong. I still do not believe the brain can detect the finer differences with rapid switching.


Right. Yet that is exactly what many people do believe. Once long ago I let these poor souls so mislead me into this nonsense that I refused even to waste my time trying to compare interconnects. Surely, their BS went, in the time it takes to change them you would forget what you heard. So don't waste your time!

Then this one dealer advertised they had this switch that would let you switch between two interconnects. They could even pretend to switch if you wanted, a true double-blind! 200 miles later when I got there the switch was broke. Well I'm here... waste of time... but might as well....

So after listening a few minutes to one I got up, changed the source input, changed the interconnect, changed the source input back and.... freaked out! Instantly, immediately, from still standing BEHIND the amp I heard the difference PLAIN AS DAY!

That was back when I could hardly hear anything compared to now. So imagine how I feel hearing about how you have to switch fast, or double-blind, or any of that bull. Are you old enough to remember Mr T and his signature line?

I pity da fool.

Listen. Trust your ears. Pity those who don't.