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Skeptico Saloon: An Objectivist Joint - Page 55

post #811 of 915
Quote:
Originally Posted by davidsh View Post
 

Yet, you still need some kind of processing to determine whether you got all the bits correct eg. to avoid jitter. A buffer gives more room for corrections, doesn't correct by itself.


Well jitter is not corrupted bits.  Jitter is a timing variation upon conversion to analog.  So if bits are read off the CD into a buffer, the clock out of the buffer will determine the level of jitter experienced.  The signal off the CD could have been very jittery with correct bits, then buffered and clocked out the remaining jitter is whatever the buffer has. 

post #812 of 915

Jitter in the amount in typical home audio equipment, even the cheapest equipment is between 10 and 100 times below the threshold of audibility. Jitter is not an issue.

post #813 of 915
I'm going to put these here to remind myself to go through them eventually.
http://www.tnt-audio.com/clinica/jitter1_e.html
http://www.stereophile.com/reference/1093jitter/



^ Not objective at all, but I still want to watch them some time
Edited by miceblue - 7/20/14 at 10:07pm
post #814 of 915

Junk videos

post #815 of 915
Quote:
Originally Posted by bigshot View Post
 

This is the best 6moons review ever...

http://www.6moons.com/industryfeatures/edge3/edge3.html


This review article has significantly devalued PhDs from the University of Virginia and University of Illinois. The Cavalier's and Illini's Usnews engineering school ranking just dropped about 50 spots. :(

 

Cheers

post #816 of 915
Quote:
Originally Posted by miceblue View Post

I'm going to put these here to remind myself to go through them eventually.
http://www.tnt-audio.com/clinica/jitter1_e.html
http://www.stereophile.com/reference/1093jitter/



^ Not objective at all, but I still want to watch them some time

 

Cheers

post #817 of 915
Wow, yeah those videos were pretty terribad. Might as well ask a stranger for some advice. XD


Quote:
Originally Posted by bigshot View Post

This is the best 6moons review ever...
http://www.6moons.com/industryfeatures/edge3/edge3.html
Actually I just looked at the 0.3 MP cell phone camera photos they have there. What the heck is that? A jar of potpourri?
Edited by miceblue - 7/21/14 at 8:57am
post #818 of 915
Quote:
Originally Posted by ab initio View Post


This review article has significantly devalued PhDs from the University of Virginia and University of Illinois. The Cavalier's and Illini's Usnews engineering school ranking just dropped about 50 spots. frown.gif

Cheers

As an alumnus of the University of Virginia School of Law you should never trust their engineers. The engineering school is by far its weakest college. Virginia was founded by Thomas Jefferson as a liberal arts institution.

We joked at the law school anytime something broke it must have been made by the UVA engineers.
Edited by spook76 - 7/21/14 at 11:36am
post #819 of 915
Quote:
Originally Posted by bigshot View Post
 

Junk videos


Well it does feature comedic content. :)

post #820 of 915

The snake oil salesman gets a penny for your hit.

post #821 of 915

This graph was just posted over in the headphone forum as the "audible" differences between different pads on the same cans. Big difference, huh?

 

http://www.head-fi.org/t/685704/lightbox/post/10827101/id/1179189

post #822 of 915
Quote:
Originally Posted by bigshot View Post
 

This graph was just posted over in the headphone forum as the "audible" differences between different pads on the same cans. Big difference, huh?

 

http://www.head-fi.org/t/685704/lightbox/post/10827101/id/1179189

 

To be fair, in the two octave range from 2kHz to 8kHz, it looks like a significant (audible) difference between the stock pads and the leather pads. Here, the response varies between stock being +3ish--5ish dB in the 1--5kHz to the stock pads being -3ish--5ish dB in the 6--8kHz. In this plot, it looks like the leather pads really smooths out the peak and valley seen in the stock pads in that two octave range.

 

Otherwise, :confused_face_2:

 

To be honest, considering that it was measured, the difference here seems negligibly important compared to things like the more accurate transient response of DSD128, ensuring your DAC has < 100 ps jitter, and making sure your power cables are 6 AWG solid core sliver and that your interconnects cost no less than 10,000, such as this mid-fi choice. obvious sarcasm!

 

Cheers

post #823 of 915
I'd be interested to see what the measured isolation to pink noise is between the two pad types on any phone. I've sensed on open phones in uncontrolled listening that leather or vinyl pads sound more open/airy to me with no material playing (unplugged on head) than fuzzy pads....it could be my imagination too, as I've never specifically measured or blind tested it. The FR seems to be close enough to say the pads are not coloring played material....I wonder if they color the leaked environment differently.
Edited by GrindingThud - 8/25/14 at 5:07pm
post #824 of 915
There are a couple of things that determine audibility... The dB of the deviation and the width of the range of frequencies affected. 3dB would be audible, but I really doubt it would be audible at the bottom of a narrow dip like that. All of those pads would sound the same. Any difference would be imperceptable because the auditory memory for that slight of a difference wouldn't last through the time it takes to take one pair of headphones off and put another on. Also, the manufacturing deviation between different copies of the same make and model of headphone might be in that same range of difference.
post #825 of 915

Definitely looks audible to me.

Actually, when I tweak my parametric EQ settings even 0.5 dB changes are audible if they are broad enough. Of course I know that I changed the FR, but what can I do :o 

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