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Propeller Head Plaza Technical and scientific discussion of amps, cables and other topics. |
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Propeller Head Plaza Technical and scientific discussion of amps, cables and other topics. |
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In Reply to: This is depressing... posted by Charles Hansen on June 11, 2003 at 07:58:42:
There are a lot of people ........claim that all cables *must* sound the same because they can't measure any difference between them""CHI do not recall Steve saying that...ever..
""Furthermore it is *valid* because it is *repeatable*.""CH
Reports of repeatable measurements do indeed bolster an argument..However, repeating the same measurement using the same equipment verifies only that the measurement technique produces the same result..That should not be confused with validity..
""You can get a used Sound Technology on e-Bay for a couple of hundred dollars, and I would assume that the sound cards are about the same price.""CH
I believe there's an analyzer in there somewhere...not very cheap, they be...
""Instead, you seem to be hung up on the "gain" that the Sound Tech applies to its residual (nulled) output. As if this meant anything important!""CH
The gain applied to the residual determines what is measured by the analyzer..Assigning numbers such as -120dB down requires absolutely knowing the gain that was applied to bring the residual up to a level that the analyzer is capable of seeing..For Steve to duplicate John's test, that is all important..
""missing areas of even greater uncertainty, such as the averaging technique used""CH
That's further down the road, usually canned into the software or hardware..not even a big thing yet..
""The point is that John has found a way to measure differences between interconnect cables. Furthermore, that measurement is repeatable and is *not* due to artifacts created by the test setup""CH
John has indeed stated such..repeatedly..But has not provided sufficient details to enable anybody else to independently verify..apparently the equipment list by itself is not enough information..And, without equipment details, or independent verification, how is anybody to believe it's not a shield issue, a contact issue, or any other thing that can bugger the measurement of a 30 nanovolt signal..
I have been watching the thread develop, and can understand why Steve asks his questions..He's not received enough to repeat the test..
""You seem incapable of grasping the importance of this.""CHI think that is an incorrect statement w/r to Steve..
""If you want to refine the results (certainly a worthwhile goal), please do so.""CH
It is not possible to refine any results when the basis for the results is unknown..
""But don't whine that John doesn't do his work the way that you think he should do it. Please feel free to extend his work. (As I said, a worthwile goal.)""CH
One cannot extend another's work without knowing how the work was done..Yes, a worthwhile goal, but not possible without details..
John has said "do the work for yourself". But how is that possible without knowing what the details are?
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Follow Ups
- No, I don't think so..There are relevant, unanswered questions.. - jneutron 09:06:48 06/11/03 (0)
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