Igor375375
Head-Fier
I wonder if the LHY OCK-1 is really on par with the Gustard C18?Yep. On paper, it beats the c16. About on par with the c18. It is one domain where specs surely matter
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I wonder if the LHY OCK-1 is really on par with the Gustard C18?Yep. On paper, it beats the c16. About on par with the c18. It is one domain where specs surely matter
Even if its not as good as the C18, if it comes close, its not bad at 25% of the price of the C18.I wonder if the LHY OCK-1 is really on par with the Gustard C18?
What is thermal temperature affect other than a long term nominal frequency? Is this important to us and how? What are these other parameters?Phase noise is NOT the only number that matters in a external clock. Thermal temperature and other numbers also effect results. Many OXCO manufacturers actually believe thermal temperature is more important than phase noise including Morion.
Yes, synchronisation errors are prevented (therefore do not contribute to the phase noise increase) if two devices are referenced by the same clock. I think this is what you have heard. Whether external clocks increase jitter is a matter of a type of internal clocks and end result cannot be predicted easily. So called and very popular ultra-low phase (fem-to-second) oscilators use digital PLL internally tuned to a fixed frequency. Clock digital synthesisers for 10MHz external clock use a similar technology and in both cases quality depends on the source clock. It means, external clock wins, but there are losses on connections. In other words, it may or may not...In addition- all 10mhz external clocks increase jitter (timing errors) even though they reduce phase noise. Look it up on google.....
Yeah. Something many don't get get. Phase noise and jitter are different ways of looking at the same thing. Jitter is an average figure over the audio band giving the average timing error in seconds. Phase noise is more detailed, it give the specific timing error as a function of frequency. A phase error can easily be tranlated into a number in seconds, for those wondering.What is thermal temperature affect other than a long term nominal frequency? Is this important to us and how? What are these other parameters?
Yes, synchronisation errors are prevented (therefore do not contribute to the phase noise increase) if two devices are referenced by the same clock. I think this is what you have heard. Whether external clocks increase jitter is a matter of a type of internal clocks and end result cannot be predicted easily. So called and very popular ultra-low phase (fem-to-second) oscilators use digital PLL internally tuned to a fixed frequency. Clock digital synthesisers for 10MHz external clock use a similar technology and in both cases quality depends on the source clock. It means, external clock wins, but there are losses on connections. In other words, it may or may not...
One thing you need to remember. Phase noise is the same as jitter. Calculated differently, but the same. And which term is used, it depends on the application. External clocks have lower phase noise in a low frequency spectrum, while PLL generated clocks excel in higher frequecies, above middle audio spectrum range, but filtration is less effective for frequencies below 1kHz. For audio purpose this is the most important range.
I am not very technically adept but if you look at the Morion site- they say clearly that thermal temperature is the single most important factor in OXCO clock performance. Why?- I have no idea. Stability, and other measurements which I don't understand also effect.What is thermal temperature affect other than a long term nominal frequency? Is this important to us and how? What are these other parameters?
Yes, synchronisation errors are prevented (therefore do not contribute to the phase noise increase) if two devices are referenced by the same clock. I think this is what you have heard. Whether external clocks increase jitter is a matter of a type of internal clocks and end result cannot be predicted easily. So called and very popular ultra-low phase (fem-to-second) oscilators use digital PLL internally tuned to a fixed frequency. Clock digital synthesisers for 10MHz external clock use a similar technology and in both cases quality depends on the source clock. It means, external clock wins, but there are losses on connections. In other words, it may or may not...
One thing you need to remember. Phase noise is the same as jitter. Calculated differently, but the same. And which term is used, it depends on the application. External clocks have lower phase noise in a low frequency spectrum, while PLL generated clocks excel in higher frequecies, above middle audio spectrum range, but filtration is less effective for frequencies below 1kHz. For audio purpose this is the most important range.
It is not my experience. External clocks with Audio-gd improve staging and bass quality.Check out this article: https://www.soundonsound.com/techniques/does-your-studio-need-digital-master-clock
Overall, it should be clear from these tests that employing an external master clock cannot and will not improve the sound quality of a digital audio system. It might change it, and subjectively that change might be preferred, but it won't change things for the better in any technical sense. A‑D conversion performance will not improve: the best that can be hoped for is that the A‑D conversion won't become significantly degraded. In most cases, the technical performance will actually become worse, albeit only marginally so.
It is not my experience either. I think our ears and technical truth may not be in sync..It is not my experience. External clocks with Audio-gd improve staging and bass quality.
This article misses a very important point: phase noise under 20hz is detrimental to sound quality and no internal clock i know of can come close to an ext master clock with this regard. So using the internal clock, you are stuck with this low freq phase noise.Check out this article: https://www.soundonsound.com/techniques/does-your-studio-need-digital-master-clock
Overall, it should be clear from these tests that employing an external master clock cannot and will not improve the sound quality of a digital audio system. It might change it, and subjectively that change might be preferred, but it won't change things for the better in any technical sense. A‑D conversion performance will not improve: the best that can be hoped for is that the A‑D conversion won't become significantly degraded. In most cases, the technical performance will actually become worse, albeit only marginally so.