On Saturday, June 16, 2012 11:52:10 AM UTC-4, zoop wrote:
--
>
> I had looked at the thread you referenced, back a few weeks ago when I
> first found this forum and was just lurking, but I don't think anyone had
> gotten them all right yet- may not have even posted any results then. I
> do
> know that, given a decent sample size, 1 or 2 getting all 4 right is not a
> statistically significant result. But I will revisit that thread.
Though the statistics aren't straightforward or necessarily robust -- the
sample size is small and not everyone attempted to make every ID -- and
the experiment is of course not 'controlled' rigorously, within those
limitations even one person (it was just one) correctly ID'ing 4 different
signals purely by chance is unlikely -- a statistician friend has
confirmed this for me. This wasn't a binary A/B/X where the task was to
distinguish A from B over and over, and where 4 correct IDs out of 4 would
not be so rare by chance. This was four different signals, A,B,C,D. You
can read about some of the analysis here
http://www.hydrogenaudio.org/forums/index.php?showtopic= 94149
I personally find it impossible to do a fast-switch blind test of
multichannel files with my setup as it is,and did not hear any notable
difference at all between the tracks when I played them as 5.1, which is
why I was most curious to learn what aspect or timepoint people were
'cueing' from to tell them apart.
I checked out the results and it looks like actually 2 of 9 got all 4 right. Despite being too small a sample size and lack of rigorous controls, this is a surprising result. Of course, the sample also included what I assume are ears much more highly trained than the average listener, but it still gives some support for the fact that some audiophiles may be able to distinguish between high and low bit rate and sampling. It would be interesting to see what controlled experiments have shown about this. I'm surprised you don't know some of these results- this seems like the kind of thing you'd have researched. I remember first hearing about the euphonic distortion on albums being one reason some prefer vinyl reading one of your amy posts long ago.
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