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Jitter Correlation to Audibility

Discussion in 'Sound Science' started by robertsong, Jun 19, 2013.
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  1. nick_charles Contributor
    LOL - JA cut the graph off at that point and expanded it to make the result more dramatic I guess. Owners of that device by and large love it and it received good subjective reviews in several places - what can we tell from this  - shrug !
  2. SharpEars
    With everyone and their grandma using USB outs from computer to DAC, I wonder how bad the USB jitter is. Have there been any articles that looked at USB jitter, or jitter present in Asynchronous USB implementations - the latest fad.
  3. esldude
    Well this was the article I actually had in mind.  Had something of a hall of shame for high jitter levels with the McIntosh being worst. The Pioneer, Playstation and others are in this list.
  4. bigshot
    Of course, even the worst there most likely has inaudible jitter in normal use.
  5. cjl
    The graph cuts off at -70 because in the vast majority of cases, if you showed the full scale from -120dB or so up to 0dB, you wouldn't really be able to see the effects of jitter in the graph at all. You have to zoom in on the quiet areas to see any significant difference at all between most modern pieces of equipment. Admittedly, that isn't the case with this rather appalling example, but they probably want to keep their graphs consistent between reviews. They're pretty clear what the signal is in the caption too, so it doesn't seem like they're intentionally trying to deceive.
  6. bigshot
    Most people don't know what -70dB (doesn't) sound like.
  7. esldude

    Well everyone knows jitter is responsible for most audiophile problems.  Clearly audible.  -70 db is about 40 db more than jitter so we are talking about a serious issue there don't ya think?   [​IMG]
  8. castleofargh Contributor

    hirez sounds better !
    so obviously sounds from -96 to -144db are clearly audible, being a good deal of the "better" part.
    so -70DB is super loud!  QED
  9. blades
    No I think hearing bias is responsible for most audiophile problems.
  10. esldude

    Surely if that were true there would be lots of audiophile products available to fix hearing bias.  As I don't see such products in the important magazines your premise would appear to be quite faulty.  [​IMG]
  11. bigshot
    Booze makes every system sound better!
  12. castleofargh Contributor
    I use an avant garde concept that says: if there isn't a problem stop trying to solve it!
    but booze works fine too.
  13. blades
    Two problems with that concept.  The first is that hearing bias occurs inside the brain.  The only products that affect what goes on inside the brain are illegal without a prescription.  The second is that audiophiles don't accept the existence of hearing bias or are unaware of it.
  14. bigshot
    If they don't realize they have bias, and it's in their brain... that means we have to slip them a mickey while they aren't looking.
  15. esldude

    Au contraire, there are many products that effect what goes on inside the brain while being outside of it.  Thick anodized front plate, expensive brand name engraved upon it for one.  Literature to pre-condition the brain when listening occurs.  Mutual brain biasing camaraderie amongst audiophile groups.  Not even a scratch upon a scratch of the list of such things.
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