I have listened to a bird outside. It is a very clean signal, no phase noise, frequency between 800 and 1200 Hz level about 30 dB above my hearing threshold, not too far, distortion is minimal, there is some traffic background noise. Can your system of measurements tell me if it is a Red or Green bird?
Yes, but asymmetrical crosstalk can be a disaster. I have an HPA with incredible distortion and noise specs. It does not have intentional cross feed. It could make an incredible line amp, except it has asymmetrical crosstalk. Its stereo image is lopsided.
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1) ratio or time. your answer is important
2) you mean propagation loss, of which frequencies, where, sea level or Everest, from how far. Length of the living room.
I do see the truth in your second point, cars with huge woofers go boom boom from afar, you hear nothing else, but that would not be what one would like to listen too.
Mark,
Very decent of you pointing to an old HP colleague of mine Siegfried, we and some other engineers in SAD often debated speaker design and evaluation. He was not an acoustic engineer but electronic engineer as the rest of us. You don't highlight any specific publications of his so I take it that you meant read them all.
Very decent of you pointing to an old HP colleague of mine Siegfried, we and some other engineers in SAD often debated speaker design and evaluation. He was not an acoustic engineer but electronic engineer as the rest of us. You don't highlight any specific publications of his so I take it that you meant read them all.
thank you, I appreciate your recognition of my expertise, it was a long journey to get there, started in 1972 rubbing shoulders with some of the most prominent engineers of the time. Even Dave Packard. Siegfried Linkwitz. Those were the good old days when your country was technologically still relevant.
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You aren’t the only person reading the comments. Neophytes also read them to learn about the hobby, and which I believe we should foster. I try to keep that in mind when I comment. No insult was made, or even implied. Your reactive, insulting response is wrongheaded.
I beg your pardon, I did not attack your integrity. You made the statement and I responded. I see you quickly deleted your response. I have already reported it.
This thread is in danger unless hostilities cease immediately.In my humble opinion rayma, kill this thread, it has outlived its usefulness, it is now becoming a derogatory contest and I don't want another warning.
I suggest you leave the thread. I don't think I've had a warning apart from on the first page for copying an insult someone else threw at me (not sure they got a PM about it)
I did a bunch of blind tests on the d90, gustard A18 and smsl 400, all level matched to a few mV. Thought we could hear differences when sighted. Guess what, 6/10 was the best we could hit on repeated ABX switching.
Gave up worrying about dacs after that.
Gave up worrying about dacs after that.
How did you validate the experimental apparatus for switching? Did you use test subject training to counter the false negative bias of ABX in untrained listeners? Did listeners evaluate dacs for soundstage parameters? Prior to the test, did test subjects make a conscious effort to memorize the quirks and sound stage of each dac? What test music was used, and how familiar were the test subject with the musical content?
Also, have you read Jakob2's theory about amateur ABX testing?
IME this kind of obsession is often to find in people who converted themselves from "golden-ear" to "non-golden-ear" , usually by doing some kind of "blind tests" without knowledge about propper sensory testing.
So they decide having erred all the time when perceiving differences between electronic audio devices (including cables and other stuff) under the premise that the measured numbers are below the known hearing thresholds.
The next step in the reasoning seems to be that they did not just have fooled themselves (when believing these differences exist) but were misled by a world wide conspiracy of manufacturers, reviewers and sales men. This way it is obviously easier to accept the former illusion. "It wasn't my fault, I was tricked into it...."
In this state of belief it is (IMO) apparently extremely difficult to accept informations that provide evidence contrary to the new belief, as it would mean to accept that he might have triple-fooled himself during the conversion process.
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I have done A/B comparisons of records and CDs of the same material. The most impressive part is how similar they sound. Sometimes I cannot tell which one is playing, at least for a few seconds. 🙂
Ed
Ed
That is already the 2nd time you quoted that opinion in this thread. How about repeating also the outdated marketing stuff from ESS or the Purifi AM/FM files.
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