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  1. #41
    Thanks for your reply Phil. Yes, I'm also interested in hearing what different amounts of jitter sound like. That could be an intersting experiment.

    A good friend of mine is a recording engineer and we've experimented quite a lot with the "good sounding" harmonic distortion of valve pre-amps. It's an eye-opening experience for most people that have not being exposed to it before!

    Being an electronics engineer with a master's degree in digital signal processing I typically prefer the more elegant technical solutions. :-) Unfortunately that is not what I'm seeing with the transport being the clock master - hence my leaning towards the solution where the DAC is the clock master which simplifies things considerably, and hopefully bringing down the price of high quality digital audio.

    I agree that existing solutions using the PLL or re-clocking/re-sampling approaches do sound good. However, the really good ones do come at a considerable cost in financial terms My believe is that the DAC as clock master can make even a cheap CD player a great digital source. Now we need to work on the cost of DAC's which can act as clock masters...

    That's just the engineer in me striving towards the more elegant and more economical solutions...

  2. #42
    Founder, Slim Devices seanadams's Avatar
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    Quote Originally Posted by tot View Post
    20kHz is 50ns for full cycle, or 25ns for half cycle. Some parts of the body are clearly quite fast reacting.

    Teemu
    Close - you're only off by a factor of a thousand.

    milli = 10^-3
    micro = 10^-6
    nano = 10^-9
    pico = 10^-12

    At any rate, the ear doesn't work like that. It picks up frequencies, not samples over time. http://en.wikipedia.org/wiki/Organ_of_Corti

    Anatomically speaking, I suppose you could say that jitter would, for each frequency component of the signal, cause additional slight stimulation of the hair cells right next to the intended one for that frequency.

  3. #43
    Senior Member Patrick Dixon's Avatar
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    Quote Originally Posted by Phil Leigh View Post
    I just don't think jitter lends itself to a measurement-audible quality correlation in the same way as (say) THD or IMD.
    In many ways there are similarities between jitter and distortion measurements, as they are all commonly expressed as 'a number', although the spectral content behind the headline number is probably just as important.

  4. #44
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    Quote Originally Posted by Patrick Dixon View Post
    In many ways there are similarities between jitter and distortion measurements, as they are all commonly expressed as 'a number', although the spectral content behind the headline number is probably just as important.
    Patrick - that's what I meant in my inelegant way...the headlines are not the whole story...
    You want to see the signal path BEFORE it gets onto a CD/vinyl...it ain't what you'd call minimal...
    Touch(wired/W7)+Teddy Pardo PSU - Audiolense 3.3/2.0+INGUZ DRC - MF M1 DAC - Linn 5103 - full Aktiv 5.1 system (6x LK140's, ESPEK/TRIKAN/KATAN/SEIZMIK 10.5), Pekin Tuner, Townsend Supertweeters,VdH Toslink,Kimber 8TC Speaker & Chord Signature Plus Interconnect cables
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    Kitchen Boom, Outdoors: SB Radio, Harmony One remote for everything.

  5. #45
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    Quote Originally Posted by seanadams View Post
    Close - you're only off by a factor of a thousand.
    I had a gut feeling something was terribly wrong, but went ahead regardless .. :-)

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