This may had been better put in one of the expert sections but anyway, and I want to stress this is anecdotal so please do not be upset if feel that it does match your view or experience.
For some time Paul Miller thinks-experienced that there can be a loss of focus/sharpness to the sound-image if uncorrelated jitter widens the signal as seen from his detailed jitter plot.
Unfortunately the measurement graph I am talking about is in the paper-magazine publication and not his online site.
There has been previous examples of products reviewed where the mention of the above factors have been commented on by the reviewer without them knowing about the measurement.
However in the September 2011 issue, this has been usefully emphasised by the review of the Chord Electronic QBD76 DAC.
This DAC has a setting for buffering and can be disabled or set to a maximum of around 4 seconds, Chord Electronic developed this many years ago and has fine tuned ever since.
What is interesting is that the measurement shows correlated jitter only changes marginally between the buffer disabled and set to a maximum of 4 seconds (jitter went from 15psec to 13psec), but looking at the uncorrelated graph it is possible to see a widening around the test signal when disabled, and reduced a lot when set to maximum.
The reviewer of the product was John Bamford who has a lot of experience in the audio world and in his review says:
Still anecdotal, but a good indication of what Paul Miller suggests are the effects of uncorrelated jitter when involved in the thickening of the signal.
Thought it worth sharing anyway.
Cheers
Orb
For some time Paul Miller thinks-experienced that there can be a loss of focus/sharpness to the sound-image if uncorrelated jitter widens the signal as seen from his detailed jitter plot.
Unfortunately the measurement graph I am talking about is in the paper-magazine publication and not his online site.
There has been previous examples of products reviewed where the mention of the above factors have been commented on by the reviewer without them knowing about the measurement.
However in the September 2011 issue, this has been usefully emphasised by the review of the Chord Electronic QBD76 DAC.
This DAC has a setting for buffering and can be disabled or set to a maximum of around 4 seconds, Chord Electronic developed this many years ago and has fine tuned ever since.
What is interesting is that the measurement shows correlated jitter only changes marginally between the buffer disabled and set to a maximum of 4 seconds (jitter went from 15psec to 13psec), but looking at the uncorrelated graph it is possible to see a widening around the test signal when disabled, and reduced a lot when set to maximum.
The reviewer of the product was John Bamford who has a lot of experience in the audio world and in his review says:
I found the buffering improved the sound markedly, sharpening the image and increasing clarity, so left it engaged max for listening to music.
Still anecdotal, but a good indication of what Paul Miller suggests are the effects of uncorrelated jitter when involved in the thickening of the signal.
Thought it worth sharing anyway.
Cheers
Orb