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#1
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I don't keep up with the "hot" subject in audiophile techno-babble as
much as I used to, but "jitter" was once a biggie. Come on now: were are talking about phenomenon that occurs on a scale of NANOSECONDS (billionths of second). Electricity (and therefore electrical signals) moves at a rate of about 1 foot per nanosecond. From all the graphs that claim to measure this phenomenon it appears that it's not a cumulative thing; and even if it was how many billionths of a second have to add up before you can hear the effect?? |
#2
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Perhaps it's time for the group to split into two:
rec.audio.high-end and rec.audio.high-end.haters. Mike Prager North Carolina, USA |
#3
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"Mike Prager" wrote in message
... Perhaps it's time for the group to split into two: rec.audio.high-end and rec.audio.high-end.haters. Mike Prager North Carolina, USA It has gotten ridiculous around here lately, hasn't it? I guess those of us who like and get pleasure from the hobby are supposed to just go away and be quiet and listen to our systems, rather than having anything to say, but...........hey, that's not a bad idea, is it? Maybe some of the "haters" would benefit from doing the same. |
#4
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Mike Prager wrote:
Perhaps it's time for the group to split into two: rec.audio.high-end and rec.audio.high-end.haters. Why? Because the guy asked how much jitter it takes to be audible, that makes him a hater of high-end audio? Do "high-end lovers" think that question is unimportant or irrelevant? Do you? bob |
#5
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Jim wrote:
I don't keep up with the "hot" subject in audiophile techno-babble as much as I used to, but "jitter" was once a biggie. Come on now: were are talking about phenomenon that occurs on a scale of NANOSECONDS (billionths of second). Electricity (and therefore electrical signals) moves at a rate of about 1 foot per nanosecond. From all the graphs that claim to measure this phenomenon it appears that it's not a cumulative thing; and even if it was how many billionths of a second have to add up before you can hear the effect?? If the receiving circuitry doesn't have a nice stable phase-locked loop that rejects the input jitter, the timing error is analogous to an error in the amplitude domain. If you're clever at information theory you can indeed prove this fact. SPDIF bit period is around 350 ns @ 44.1kHz samplking rate. So jitter of +/ 1 ns for example would be an error of 1 part in 350, or about -50dB ref full signal. That's a lot of error. Graham |
#6
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#7
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wrote in message ...
Mike Prager wrote: Perhaps it's time for the group to split into two: rec.audio.high-end and rec.audio.high-end.haters. Why? Because the guy asked how much jitter it takes to be audible, that makes him a hater of high-end audio? Do "high-end lovers" think that question is unimportant or irrelevant? Do you? It's going to take a lot (whatever the electro-physico explanations). In the early days of CD, when there were only 1 box units available to play discs, golden eared high enders were endorsing 2 boxes; drives and D/A converters to get superior sound. Isn't that where jitter entered the picture? One box delivered better (jitter free) sound. |
#8
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"Harry Lavo" wrote in message
... "Mike Prager" wrote in message ... Perhaps it's time for the group to split into two: rec.audio.high-end and rec.audio.high-end.haters. Mike Prager North Carolina, USA It has gotten ridiculous around here lately, hasn't it? I guess those of us who like and get pleasure from the hobby are supposed to just go away and be quiet and listen to our systems, rather than having anything to say, but...........hey, that's not a bad idea, is it? Not good at all. Sooner or later I am going to hear some type of "ugly" from my speakers; you are familiar with everything that is likely to follow, aren't you? A different pleasure part of the hobby will be set in motion. One might even attempt to post a question on rec.audio.high-end. Or if you are either a glutton for punishment, or want to lighten up by getting a few laughs, there is always rec.audio.opinion. |
#9
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Mike Prager wrote:
wrote: Mike Prager wrote: Perhaps it's time for the group to split into two: rec.audio.high-end and rec.audio.high-end.haters. Why? Because the guy asked how much jitter it takes to be audible, that makes him a hater of high-end audio? Do "high-end lovers" think that question is unimportant or irrelevant? Do you? Audibility of jitter is a question that has been studied before. That message had no interesting factual content;it was just a diatribe apparently based on some preconceived notion. But it did elicit at least one substantive response. That's sometimes how we move ahead here. Unless I've missed previous posts, that individual has contributed nothing to this group other than telling some enthusiasts they are wrong, wrong, wrong. All I have seen is disdain (or hate) for this hobby, nothing that indicates any love for or pleasure in it. That's right: high-end audio is a HOBBY. People do it for FUN. I am always up for intelligent discussion, but I'd rather have Carrie Nation meet in church with her fellow liquor haters than come into the bar where I'm having a drink. A flawed but revealing analogy. A guy who argues that jitter doesn't matter is not arguing that high-end audio is an evil hobby, or even a dumb one. He's only arguing that jitter doesn't matter. Now why would someone think that "jitter doesn't matter" is a statement of hatred? All right, I'll concede that his tone was disdainful. But there is a difference between being critical of people who believe things that are (or that you believe to be) demonstrably wrong and being critical of people because they choose to pursue a particular hobby. You've taken the first statement to imply the second. I don't want a PETA representative on my fishing trip. That's why I suggested that I'd prefer those whose only purpose here is to pick fights to find another place to vent their spleen. Of course, it's their right to stay here and do nothing but carp, pick fights, argue, and twist other people's words. Usenet is just that kind free. But, those of us who ENJOY the hobby might have more fun if those who HATE it find their own spot. Who knows, they might enjoy it, too! Now Bob, I don't think there are that many whose comment are only, or mainly, that sort of tendentious griping, but it seems there are more and more who can't let a discussion go it's course without picking a fight. Too bad, I think. Well, think of it as partially making up for the voluminous instances on the non-moderated and thought-policed sites where people have asserted that if you can't hear differences between such-and-such either your system or your hearing must be defective. bob |
#10
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Mike Prager wrote:
wrote: Mike Prager wrote: Perhaps it's time for the group to split into two: rec.audio.high-end and rec.audio.high-end.haters. Why? Because the guy asked how much jitter it takes to be audible, that makes him a hater of high-end audio? Do "high-end lovers" think that question is unimportant or irrelevant? Do you? Audibility of jitter is a question that has been studied before. That message had no interesting factual content; it was just a diatribe apparently based on some preconceived notion. Unless I've missed previous posts, that individual has contributed nothing to this group other than telling some enthusiasts they are wrong, wrong, wrong. All I have seen is disdain (or hate) for this hobby, nothing that indicates any love for or pleasure in it. Personally, I love getting new gear and reading what knowledgable folks have to say about sound and sound reproduction. I don't love the torrent of nonsense I've got to wade through to find high signal/noise discussion, whenever 'high end hobbyists' tend to congregate. That's right: high-end audio is a HOBBY. People do it for FUN. So do butterfly collectors. Yet they manage to adhere to scientific notions about the object of their hobby, with little if any objection. So maybe it's love the hobby, hate the *hobbyists*? -- -S It's not my business to do intelligent work. -- D. Rumsfeld, testifying before the House Armed Services Committee |
#11
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"Norman M. Schwartz" wrote in message
... "Harry Lavo" wrote in message ... "Mike Prager" wrote in message ... Perhaps it's time for the group to split into two: rec.audio.high-end and rec.audio.high-end.haters. Mike Prager North Carolina, USA It has gotten ridiculous around here lately, hasn't it? I guess those of us who like and get pleasure from the hobby are supposed to just go away and be quiet and listen to our systems, rather than having anything to say, but...........hey, that's not a bad idea, is it? Not good at all. Sooner or later I am going to hear some type of "ugly" from my speakers; you are familiar with everything that is likely to follow, aren't you? A different pleasure part of the hobby will be set in motion. One might even attempt to post a question on rec.audio.high-end. Or if you are either a glutton for punishment, or want to lighten up by getting a few laughs, there is always rec.audio.opinion. That's why I stay away from rec.audio.opinion. I hate nonsense and flaming. Even at the expense of missing an occasional laugh. For my interests, rec.audio.pro, rec.audio.tech, rec.audio.marketplace, and rec.audio.tube serve as good alternatives (although two of these are going through extended flame wars that may cause me to drop them). And Audio Asylum serves well for SACD and DVD-A discussion. |
#12
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"Norman M. Schwartz" wrote:
wrote in message ... Mike Prager wrote: Perhaps it's time for the group to split into two: rec.audio.high-end and rec.audio.high-end.haters. Why? Because the guy asked how much jitter it takes to be audible, that makes him a hater of high-end audio? Do "high-end lovers" think that question is unimportant or irrelevant? Do you? It's going to take a lot (whatever the electro-physico explanations). In the early days of CD, when there were only 1 box units available to play discs, golden eared high enders were endorsing 2 boxes; drives and D/A converters to get superior sound. Isn't that where jitter entered the picture? One box delivered better (jitter free) sound. By basic principles ( lack of need for a clock recovery circuit ) the potential for a 1 box solution to be superior in respect of jitter is indeed true. Just depends how clean your system clock is. Graham |
#13
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"Pooh Bear" wrote in message
... "Norman M. Schwartz" wrote: wrote in message ... Mike Prager wrote: Perhaps it's time for the group to split into two: rec.audio.high-end and rec.audio.high-end.haters. Why? Because the guy asked how much jitter it takes to be audible, that makes him a hater of high-end audio? Do "high-end lovers" think that question is unimportant or irrelevant? Do you? It's going to take a lot (whatever the electro-physico explanations). In the early days of CD, when there were only 1 box units available to play discs, golden eared high enders were endorsing 2 boxes; drives and D/A converters to get superior sound. Isn't that where jitter entered the picture? One box delivered better (jitter free) sound. By basic principles ( lack of need for a clock recovery circuit ) the potential for a 1 box solution to be superior in respect of jitter is indeed true. Just depends how clean your system clock is. OK, and my point was/is that the listener who wanted the best and latest equipment for listening to CD was told (by insiders having good and trained ears) to go out and replace their adequate single boxes with two boxes with added jitter. So therefore "jitter" in *practicality* was/is a red herring, and that they didn't hear the deleterious effect of jitter. Do you think anyone can suffer by the presence of jitter today (please no DBTs )? |
#14
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Norman M. Schwartz wrote:
"Pooh Bear" wrote in message ... "Norman M. Schwartz" wrote: wrote in message ... Mike Prager wrote: Perhaps it's time for the group to split into two: rec.audio.high-end and rec.audio.high-end.haters. Why? Because the guy asked how much jitter it takes to be audible, that makes him a hater of high-end audio? Do "high-end lovers" think that question is unimportant or irrelevant? Do you? It's going to take a lot (whatever the electro-physico explanations). In the early days of CD, when there were only 1 box units available to play discs, golden eared high enders were endorsing 2 boxes; drives and D/A converters to get superior sound. Isn't that where jitter entered the picture? One box delivered better (jitter free) sound. By basic principles ( lack of need for a clock recovery circuit ) the potential for a 1 box solution to be superior in respect of jitter is indeed true. Just depends how clean your system clock is. OK, and my point was/is that the listener who wanted the best and latest equipment for listening to CD was told (by insiders having good and trained ears) to go out and replace their adequate single boxes with two boxes with added jitter. So therefore "jitter" in *practicality* was/is a red herring, But the jitter that resulted from going from one to two boxes then necessitated a third box, plus very careful auditioning of the digital cables (two, now!) connecting these all up. Instead of simply accepting the low jitter inherent in decent one-box designs, this approach puts greater control over the final product in the hands of the end user, thus restoring to digital some of the appeal of analogue. Thus does the high end progress. bob |
#15
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wrote in message ...
Norman M. Schwartz wrote: "Pooh Bear" wrote in message ... "Norman M. Schwartz" wrote: wrote in message ... Mike Prager wrote: Perhaps it's time for the group to split into two: rec.audio.high-end and rec.audio.high-end.haters. Why? Because the guy asked how much jitter it takes to be audible, that makes him a hater of high-end audio? Do "high-end lovers" think that question is unimportant or irrelevant? Do you? It's going to take a lot (whatever the electro-physico explanations). In the early days of CD, when there were only 1 box units available to play discs, golden eared high enders were endorsing 2 boxes; drives and D/A converters to get superior sound. Isn't that where jitter entered the picture? One box delivered better (jitter free) sound. By basic principles ( lack of need for a clock recovery circuit ) the potential for a 1 box solution to be superior in respect of jitter is indeed true. Just depends how clean your system clock is. OK, and my point was/is that the listener who wanted the best and latest equipment for listening to CD was told (by insiders having good and trained ears) to go out and replace their adequate single boxes with two boxes with added jitter. So therefore "jitter" in *practicality* was/is a red herring, But the jitter that resulted from going from one to two boxes then necessitated a third box, plus very careful auditioning of the digital cables (two, now!) connecting these all up. Instead of simply accepting the low jitter inherent in decent one-box designs, this approach puts greater control over the final product in the hands of the end user, thus restoring to digital some of the appeal of analogue. Thus does the high end progress. Well, it might surprise you that some of us stayed with a superior one box (the Phillips 880) based on sound alone until a complex system came along that was affordable and bettered it in sound (the coax digital - DTI pro dejitterer/noise-shapper - AES/EBU -Proceed PDP). This combo bested the Phillips (whereas other highly rated and more expensive one-box units didn't). To this day this non-state of the art combo delivers more accurate, pleasing, and analog-like redbook sound than even my relatively new Sony C222ES SACD machine, which in turn was better than the marantz 63SE that drove the outboard de-jitterer/noise-shaper/DAC combo prior to its arrival. |
#16
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"Norman M. Schwartz" wrote:
"Pooh Bear" wrote in message ... "Norman M. Schwartz" wrote: wrote in message ... Mike Prager wrote: Perhaps it's time for the group to split into two: rec.audio.high-end and rec.audio.high-end.haters. Why? Because the guy asked how much jitter it takes to be audible, that makes him a hater of high-end audio? Do "high-end lovers" think that question is unimportant or irrelevant? Do you? It's going to take a lot (whatever the electro-physico explanations). In the early days of CD, when there were only 1 box units available to play discs, golden eared high enders were endorsing 2 boxes; drives and D/A converters to get superior sound. Isn't that where jitter entered the picture? One box delivered better (jitter free) sound. By basic principles ( lack of need for a clock recovery circuit ) the potential for a 1 box solution to be superior in respect of jitter is indeed true. Just depends how clean your system clock is. OK, and my point was/is that the listener who wanted the best and latest equipment for listening to CD was told (by insiders having good and trained ears) to go out and replace their adequate single boxes with two boxes with added jitter. Clearly, said sources don't understand the basic engineering principles behind the technology. Since it's not entirely obvious ( least of all to the man in the street ) and there's a big market for said 'aftermarket' products I'm unsurprised. It is potentially conceivable however that a single unit CD player might have poor inherent system clock jitter and an outboard converter has a great PLL with very good jitter rejection that does indeed improve the result. That's an extreme case - but I'm sure it happens ( most likely in the past ) . And the converse could be true too. So therefore "jitter" in *practicality* was/is a red herring, and that they didn't hear the deleterious effect of jitter. Do you think anyone can suffer by the presence of jitter today (please no DBTs )? Today ? I guess that cheap consumer gear may well suffer jitter induced defects. There's no excuse for *well designed* high end gear to suffer. Incidentally - the bit pattern used by SPDIF or AES/EBU is inherently subject to signal dependent and cable length dependent jitter at the receiver even when there is *no* jitter at the transmitter. It's down to the encoding method. Graham |
#17
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On 21 Feb 2005 17:48:56 GMT, "Norman M. Schwartz"
wrote: "Pooh Bear" wrote in message ... By basic principles ( lack of need for a clock recovery circuit ) the potential for a 1 box solution to be superior in respect of jitter is indeed true. Just depends how clean your system clock is. OK, and my point was/is that the listener who wanted the best and latest equipment for listening to CD was told (by insiders having good and trained ears) to go out and replace their adequate single boxes with two boxes with added jitter. So therefore "jitter" in *practicality* was/is a red herring, and that they didn't hear the deleterious effect of jitter. You're assuming that these 'insiders' could actually hear *any* kind of difference, as opposed to assuming that 'more is better' in typical ragazine reviewer style. How do you know that they had 'good and trained ears'? Are these the same people who told you that you needed $1,000 a foot speaker cables? -- Stewart Pinkerton | Music is Art - Audio is Engineering |
#18
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#19
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Mike Prager wrote:
wrote: But the jitter that resulted from going from one to two boxes then necessitated a third box, plus very careful auditioning of the digital cables (two, now!) connecting these all up. Instead of simply accepting the low jitter inherent in decent one-box designs, this approach puts greater control over the final product in the hands of the end user, thus restoring to digital some of the appeal of analogue. Thus does the high end progress. I haven't seen it mentioned yet that when the two-box systems were introduced, it was because they could provide substantial sonic improvements over the players of the time. One still hears reports of improved sound from adding, say, a Benchmark DAC1 to a cheap player to replace its internal DAC. Such claims are typical...but proof, ever-elusive. After the external DACs were introduced, it began to be reported that replacing the player with a well-designed transport improved the sound again. See above. This one has even less *technical* foundation than the first claim. So one could say that by separating the parts of the problem, the introduction of separate DACs and transports helped the evolution of the better players we have today. Or, one could call it one of many examples of the audiophile flywheel spinning away. -- -S It's not my business to do intelligent work. -- D. Rumsfeld, testifying before the House Armed Services Committee |
#20
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On 23 Feb 2005 02:20:48 GMT, Mike Prager wrote:
wrote: But the jitter that resulted from going from one to two boxes then necessitated a third box, plus very careful auditioning of the digital cables (two, now!) connecting these all up. Instead of simply accepting the low jitter inherent in decent one-box designs, this approach puts greater control over the final product in the hands of the end user, thus restoring to digital some of the appeal of analogue. Thus does the high end progress. I haven't seen it mentioned yet that when the two-box systems were introduced, it was because they could provide substantial sonic improvements over the players of the time. One still hears reports of improved sound from adding, say, a Benchmark DAC1 to a cheap player to replace its internal DAC. One does indeed, but one should note that the Benchmark is a product which works in quite a different way from those 'high end' DACs of yesteryear, and it is a *technically* superior product, which they certainly were not. After the external DACs were introduced, it began to be reported that replacing the player with a well-designed transport improved the sound again. It was indeed so *reported* in the audiphile press, but with little or no evidential backup. The reality is that transports only make a difference if you have a very *bad* DAC! So one could say that by separating the parts of the problem, the introduction of separate DACs and transports helped the evolution of the better players we have today. One could, but it wouldn't be true! Most experienced digiphiles agree that the best transport mechanisms ever built were the old TEACs, as used by Wadia, and the Philips CDM9 PRO, as used by several high end makers. However, it remains the case that the cheapest OEM mechanisms and associated error-correction electronics do in fact produce functionally perfect results at a total cost of some $20-30 - which is why you found a cheap plastic CD-ROM drive in the ultra-high-end Meridian 800 series when it was launched. It should be noted that, with the advent of digital tone controls and room-correction units, the two-box solution still has its uses. Indeed, and fortunately we do have such excellent devices as the Benchmark DAC-1 for the final conversion. -- Stewart Pinkerton | Music is Art - Audio is Engineering |
#21
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"Stewart Pinkerton" wrote in message
... You're assuming that these 'insiders' could actually hear *any* kind of difference, as opposed to assuming that 'more is better' in typical ragazine reviewer style. How do you know that they had 'good and trained ears'? Are these the same people who told you that you needed $1,000 a foot speaker cables? -- Who said I assumed or done any of dat? I stayed with my Magnavox CDB 650 and Odd-Job interconnect. I still use a Magnavox CDB-650 and Technics SL-P370 players and never bought a multi-box player system. I do listen to them using Maggie Tympani IVa driven by Bryston 7B ST monoblocks. |
#22
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"Stewart Pinkerton" wrote in message
... On 21 Feb 2005 17:48:56 GMT, "Norman M. Schwartz" wrote: "Pooh Bear" wrote in message ... By basic principles ( lack of need for a clock recovery circuit ) the potential for a 1 box solution to be superior in respect of jitter is indeed true. Just depends how clean your system clock is. OK, and my point was/is that the listener who wanted the best and latest equipment for listening to CD was told (by insiders having good and trained ears) to go out and replace their adequate single boxes with two boxes with added jitter. So therefore "jitter" in *practicality* was/is a red herring, and that they didn't hear the deleterious effect of jitter. You're assuming that these 'insiders' could actually hear *any* kind of difference, as opposed to assuming that 'more is better' in typical ragazine reviewer style. How do you know that they had 'good and trained ears'? Are these the same people who told you that you needed $1,000 a foot speaker cables? -- It's you who are doing all the assuming. I am not unaware of the Food Chain in High-End Audio. |
#23
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"Norman M. Schwartz" wrote in message
... "Stewart Pinkerton" wrote in message ... You're assuming that these 'insiders' could actually hear *any* kind of difference, as opposed to assuming that 'more is better' in typical ragazine reviewer style. How do you know that they had 'good and trained ears'? Are these the same people who told you that you needed $1,000 a foot speaker cables? -- Who said I assumed or done any of dat? I stayed with my Magnavox CDB 650 and Odd-Job interconnect. I still use a Magnavox CDB-650 and Technics SL-P370 players and never bought a multi-box player system. I do listen to them using Maggie Tympani IVa driven by Bryston 7B ST monoblocks. Actually, the Technics SL-P370 was a sweet honey of a moderately priced CD player. I bought one for my girlfirend and later she gave it to my son when I replaced it with a changer for her. He (a musician) still uses it as his workhorse CD player. When I auditioned it briefly in my main system, it sounded smooth and fine and musical compared to most CD player in it's price range, but lacked ultimate resolution in its electronics compared, say, to my Marantz SE/DTI Pro/Proceed system. And it lacked that latter's dynamics. But as a relatively inexpensive single box player it was hard to beat. |
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