Archimago wrote:
Exactly. It was frankly a bit odd but that's what the data seemed to
point to...
Not true transparency as I would understand the word. Rather an
unexpected bias towards MP3. It's quite amazing reading in the comments
how sure some respondents were that they were right,
Wombat wrote:
Hmm... seems like no one is reading my posts. Nonetheless if still
someone is interestet. Now i link to another side i thought i´ll never
do but this one is interesting.
Airport Express has native 16/44.1 digital out:
SoftwireEngineer wrote:
In the case, of speaker cables and power cables, if you measure the
electrical properties of stock vs say, Shunyata, there will surely be
some difference.
Right. Measureable electrical differences are one thing, and I would not
have anything against cable suppliers if
jvanhambelgium wrote:
The Touch is using a ultra-lineair 5V PSU (Sigma11 design from AMB
Laboratories)
Just curious - have you done any double-blind ABX to see if the PSU
actually makes any audible difference?
Julf's
I use a Quad Link D1 USB DAC...prob sell the MyDAC
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cdmackay wrote:
Is this really consistent with that? This test seems to show a
preference for MP3, which suggests a lack of transparency, for whatever
odd reason. Or are you saying this test is the rare special case?
and thanks to OP for the excellent test :)
Yes, you're correct. I was
I didn't respond to the survey because I could not establish a
preference.
However, I randomised Keine Zeit through playlists and listened a
total of 10 times (i.e. no cherry picking a sequence). I picked out
one that sounded whiter as A, 9 times out of the 10 tries. So I'm
pretty sure I could
Quote Originally Posted by azinck3
3) Your main question which set sounded inferior had 3 answers: A, B,
or no audible difference. This, paired with the question about
confidence does a decent job of answering the question which sounds
better but I wonder if it does a good enough job of
Mnyb wrote:
But given identical files i would not be surprised if one letter A or B
is preferred over another people work that way .
As individuals yes. But as a group, if a statistically significant
number of people chose one or the other then that is interesting.
Mnyb wrote:
That
darrenyeats wrote:
As individuals yes. But as a group, if a statistically significant
number of people chose one as better that's interesting. Or do you mean
there's a subconscious bias to the letter B, something like that?
As I understand it, you're suggesting the survey is invalid
darrenyeats wrote:
As I understand it, you're suggesting the survey is invalid because of
the encoding? If so, I would like more detail.
Darren
See the discussion here and particularly Post #18.
http://www.hydrogenaudio.org/forums/index.php?s=showtopic=98890view=findpostp=822862
in
darrenyeats wrote:
As individuals yes. But as a group, if a statistically significant
number of people chose one as better that's interesting.
As I understand it, you're suggesting the survey is invalid because of
the coding? If so, I would like more detail.
Darren
No i dont think it
darrenyeats wrote:
As individuals yes. But as a group, if a statistically significant
number of people chose one as better that's interesting. Or do you mean
there's a subconscious bias to the letter B, something like that?
I can't put my hands on the research right now, but I recall
garym wrote:
I can't put my hands on the research right now, but I recall seeing
papers that suggest in testing using multiple choice questions, there
are group biases exhibited in choosing certain answer options (A, B, C,
D, etc.). He couldn't easily do this in this study, but had he been
Mnyb wrote:
Is this similar to that on test with tick boxes people want to tick
somewhere in the middle , so you shuffle the position for questions and
have variants of the tests
yes. And not exactly related, but there is lots of evidence that order
stimuli are seen/heard can affect
garym wrote:
yes. And not exactly related, but there is lots of evidence that order
stimuli are seen/heard can affect decisions, even with experts. For
example, recency effects and primacy effects
http://en.wikipedia.org/wiki/Serial_position_effect
and of course ABX with multiple trials
garym wrote:
I can't put my hands on the research right now, but I recall seeing
papers that suggest in testing using multiple choice questions, there
are group biases exhibited in choosing certain answer options (A, B, C,
D, etc.). He couldn't easily do this in this study, but had he been
Julf wrote:
Right. Measureable electrical differences are one thing, and I would not
have anything against cable suppliers if they explained the properties
of their cables in those terms. Unfortunately they tend to resort to
snake oil pseudo-science gobbledegook such as electric field
nordost and few others provide the measurements. Nordost's construction
is actually pretty fascinating.
It is cheaper to buy good copper or silver wire and Teflon and make it
yourself.
SoftwireEngineer's Profile:
garym wrote:
[more off topic.] . . . So B or C are always good guesses but you
want to pick one and stick with it on ALL questions requiring guessing.
. .
Minor quibble here, but if you toggle between B and C on a random basis,
the results won't be any different than sticking with one
RonM wrote:
Minor quibble here, but if you toggle between B and C on a random basis,
the results won't be any different than sticking with one answer all the
time. We must assume that B or C will be right the same percentage of
times (on average, over all of our tests), and each decision is
It's Transporter time!
In order to do the measurements, I brought the gear downstairs to the
basement which is an electrically quieter environment. There's a Belkin
PureAV PF60 power center there for all the equipment. Also, the
measuring computer is now an AMD Phenom X4 laptop with Win 8
One more thing before leave the Transporter alone... I wanted to see if
turning on the TosLink effects loop affected measurements. Normally, I
have the Transporter -- TosLink -- Behringer DEQ2496 (room EQ) --
TosLink -- Transporter as DAC, so it'd be nice to know that the DEQ in
digital mode
Nice! Thanks for doing the Transporter analysis. I like (and use) the
XLR connections of my transporter.
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Archimago wrote:
Hi Pippin; great work on iPeng BTW! Been using it for years :-)
On the 1st page of this thread for the Touch measurements MEASUREMENT:
Logitech Squeezebox Touch (Pt 2), I measured the WiFi vs. ethernet
conditions (16/44 amp; 24/96) using the Touch's analogue output and
SoftwireEngineer wrote:
The higher system load is on ipads right ? Have you checked this out on
the Squeezebox itself (which is where this suggestion originated) ? This
probably is related to hardware architecture.
It was on iPad, yes.
But the system load argument has also been brought
Wombat wrote:
Hmm... seems like no one is reading my posts. Nonetheless if still
someone is interestet. Now i link to another side i thought i´ll never
do but this one is interesting.
Airport Express has native 16/44.1 digital out:
ralphpnj wrote:
I have a WDTV Live streaming device that I use to watch movies and
stream video and movies from Netflix. This device will also play flac
files BUT I still have Touch connected to my home theater because the
Touch/Squeezebox Server+Plug-ins (haven't made the jump to LMS as
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