arnyk wrote: 
> My own take is that measuring gross differences is, well gross. One
> serious problem with gross differences is that their size can be huge
> when there is actually no audible difference, just a slight difference
> in timing.

Indeed. Bill Waslo's 'slides'
(http://www.libinst.com/Detecting%20Differences%20(slides).pdf) actually
point out that a timing/phase error as small as 93 ns turns a perfect
null into a 55 dB one at 1 kHz, and a 0.03 dB level error makes for a 50
dB null instead of a perfect one. This is why programs such as audio
diffmaker do is apply crosscorrelation to time align the signals, as
well as gain equalisation.



"To try to judge the real from the false will always be hard. In this
fast-growing art of 'high fidelity' the quackery will bear a solid gilt
edge that will fool many people" - Paul W Klipsch, 1953
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