Answer me this

[cheeseboy]

Jitter, above a certain level, is audible.

erm, I did say that did you listen to those tracks I linked to with the jitter added so you can actually hear what jitter that is audible sounds like?

There have been a number of tests carried out by PaulMiller in which high jiitter co-incided with reviewers notes. I would say he knows his zero's and ones.

got a link? (genuinely interested to read)

It's not 'the new No.1 of hifi buff's enemy', it has always been an issue, just less now with the superchips used but if the implementor hasn't paid attention to the power supply it can still be a cause of alteration.

power supply isn't anything to do with jitter though. Jitter is clock timing issue, not power supply related issue. EDIT - Apologies Drummerman, just been reading and didn't realise about the effect of the influence of the psu on jitter.

But I do see it more and more being trotted out as to reasons why something may sound different, especially more so with all the computer related things, which is kind of a backwards step as using a computer is actually less likely to give you jitter issues over say a cd transport.

 

[cheeseboy]

I think you find there are serveral variations and causes of jitter, not just clock related, including fluctuation of power supply etc etc which can be measured and which can affect the end result, depending on severity.

Unfortunately I can't post links (or pictures) but a quick google on the subject (try power supply jitter for one) should be enough. There are white papers on the issue.

yep, sorry, I ammended my post above at the same time you were posting - apologies on that issue above.

either way have a listen to those samples, I'd be interested to know what you think.

 

[davedotco]

maybe the input senstivity is much stronger on the sony blu ray when my transport arrives home Ill check that and bump it up on my dac. But this is strangley two different sounding systems blu ray being the better of the two. as a example volume -39 (on the cyrus pre2 Qx) on the blu ray is strong and loud where the cyrus transport on 39 was meh i could hit -27 and it still wouldnt have been this strong. With the cyrus I couldnt get that umph it just was flat, good but flat and very very very lean.

back to the bryston and nas systems if all else I could get a 128 gig flash stick as well if I didnt want to invest in a another backup system. I honestly thought my western digital hard drive would have done the trick.

This is the crux of the issue. The volume difference is everything here, though why there should be one is beyond me.

The descriptions you give of the sound difference are exactly what you would expect if the output of one unit is much lower than the other. It is impossible to subjectively adjust for the difference, even turning up the Cyrus will not help, you are conditioned to what you have heard and that is a bigger, bolder sound from the blueray and it is virtually all down to volume.

To really nail this, you have to level match and listen blind.

Play a bit of music to establish a sensible level, then play a disc with a test tone and measure the voltage at the speaker terminals with a multimeter. Set up the other player to give the same voltage by adjusting and noting the amplifier volume. Get someone to play you each player, adjusting for volume and not letting you see which is which.

Odds are that the differences will all but dissapear, hard to believe until you try it, give it a go.

 

[Mike_Schmidt]

I dont need to do a A/B test as I know clearly as the night is long this is so far off even a non audiophile who thinks were crazy would hear the difference. Without knowing me Im really finicky everything has to be just so as i left it or Ill change it. This has to come down to input senstivity maybe the Cyrus was cooked from day 1? I can remember me emailing the distributer about the issue of the player cutting in and out months ago went away it would come back and then finally unplayable without fading out then coming back in. With the Cyrus transport it didnt matter how much I turned the volume knob it flat lined where this sounds unstopable with that Stereo 200 behind it. Im godsmacked by it still but that transport should be back in two weeks.

 

[davedotco]

If the Cyrus transport is defective that makes a nonsense of the whole thread.

If, on the other hand, the two transports are working correctly, I stand by what I said above. You need to do the test, sighted tests, without level matching are worthless in this scenario.

 

[Mike_Schmidt]

We'll not really I was asking about the Bryston bdp-2 or the Cambridge cxn for digital storage playback. The transport was a second part but if it's only the pick up that wouldn't have anything to do with output maybe it does maybe this is for nothing but I do want some advice on the Bryston and hooking up a nas or in my world a western digital external hard drive. Is that even possible or do I need a true nas storage system. My understanding is I could use a usb stick on the Bryston as a alternative. Would this unit or the Cambridge be a better play back system than a transport.