Jitter and clocks
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- čas přidán 1. 02. 2014
- Ted Smith explains clocks and their importance in the audio chain. All audio systems run on clocks and the quality of those clocks contributes to one of the major problems in sound, jitter. How do expensive, specialized clocks like rubidium devices affect the jitter? You might be surprised at the answer.
- Věda a technologie
My hat off.
You can always tell an expert by the fact he does not fudge any part of an explanation.
Explained it better than my textbook! Thanks for helping me get a few extra questions right on my final!
What a good explanation. This is the one thing that the bits are just ones and zeroes folks don’t understand.
What a simple and amazing explanation
Thank you so much for this video! A fantastically clear explanation!
2 thumbs up!! this guy is very interesting.....a good teacher!!
dont know if anyone cares but if you guys are stoned like me during the covid times you can watch pretty much all of the new movies and series on InstaFlixxer. I've been streaming with my girlfriend during the lockdown =)
@Jon Jett Definitely, been watching on Instaflixxer for years myself :D
So beautifully explained!
Finally... after participating/witnessing so much arguments about how could "fill in the blank here" matter if it is digital ...I wonder why there isn't an answer coming from someone with the knowledge, because I can hear the differences but why? and now a real engineer/audiophile master explains it... Thank you!!
Clocks are important.
Rodney D Digital is essentially power supply and clock.
Very interesting, this is exactly the kind of technical video I'm looking for. I bought a Beresford Caiman SEG DAC with a linear 15v PSU and I'm very impressed with it. So good that my CD player is now relegated to being just a transport. I'm now interested in the various modes it offers - 1. S/PDIF clock signal, 2. optimized XTAL processing, 3. PLL clock processing mode and 4. DATA recovered clock processing mode
Excellent presentation ....thank you sir!
I have a Master Clock for my (4) 8 channel converters. I ended up using the master clock from my PCI soundcard as it has the ability to use a syn check with every converter. Ive read many say a dedicated master clock will get better results. I have a master clock and a clock distributor, but I'm going to clock over over ADAT for simple ease of use. Unless someone here tells me differently. I trust this guy over any one on any forum. Thanks-
THIS IS GREAT! Thank you!
Nice information.
Excellent!
MIND BLOWN
wow this was very informative
Love the information. Maybe I missed it in an earlier video but how have you overcome the jitter problem in your products? Did you get a vendor to build special components (crystal or whatever), or did you build specialized pieces to handle the jitter problem?
*****
Thanks for the clarification. Appreciate the sharing of information at this level and appreciate the lack of "sales" agenda as well. Great role model for other people and companies.
great video, could you tell me please if the music played with the pure quartz frequency, without PPL would be better quality than for example played on a 2,4 ghz machine?
Thank You
Are those time based errors in the same range (or smaller, or larger) than analog time based errors, i.e. belt elongation, wow, in the groove accelerations of the needle?
How to sync clocks with data on o percent delay
Can you explain why company "X" says that their rubidium clock is only used to stabilize or discipline your other quartz clock? Is this technique possible and does that method reduce jitter from the quartz clock? By the way, company "X" will never ever produce their product's jitter specs. Smells fishy.
Hi Paul. What is your opinion on a 10MHz reference clock with 461fs RMS of phase jitter? Is it usable for audio? The device has two synced outputs, by the way.
The lowest value i´ve seen people reliably tell in blind tests is 0,2 microseconds, so 461 fs MIGHT be overkill.
That's what I thought. But I wanted to know the opinion of an audiophile on this matter. After all, I have low jitter OCXOs to sell. Those were built for lab use, but audiophiles may want them too, although they might not like the fast edges because it makes the sound too "fast".
There are some audiophile dacs with jitter in the femtosecond range, like the Mola Mola (300fs).
I dont know about the actual implementation of your clock on a system, but there is, however, a demand for clocks of this precision in the audiophile world.
There is no implementation. It is just a 10MHz OCXO based clock generator that I've made for lab use. It has two BNC outputs.
@@bloguetronica How did you measure the Phase noise? 461fs is ridiculously low if you measure from 10Hz offset, but if you measure from 1MHz offset it is not too spectacular.
I don't agree with the assertion at 2:40 of "Jitter doesn't matter until you get to the very point of where you get from the digital to the analog". Well, how about the sampling jitter (analog to digital conversion) on the original digital master? The era of digital music started in the early 1980s and if oscillator jitter is such a big topic still today (which I will claim it is not with proper engineering), we should have some serious issues with recordings of the first CDs using digital sampling with 35 years ago oscillators, right? An audiophile person believing that he can hear jitter issues in modern equipment should easily be able to identify jitter issues in CDs from 35 years ago. Or what? :-) So which title of song from the early days in digital audio has audible jitter issues in the recording?
virtualy every early digital recoding as audible jitter
I am a true believer of the existence of sampling jitter.
the 'directstream' mastermind finally revealed !! The Oracle of Boulder !!
lmao aaaaaaand screw you Antelope. That's basically what he said in the beginning hahahaha
oh MAN this is the cmos dead zone. it saves your ass some times, but yeah shit when ya put it like this. they must have some pretty damn precise tight tolerances.
Definitely either add a ddc or use a streamer if you're using a beefy pc like me. Connecting the dac directly to the pc is horrible recipe for audio. It sounds like a like an fm station that's mistuned. That is what jitter is.
He has a scope behind him, but does not use it to show us the actual jitter he's talking about. Would have taken but seconds to set up an example.
czcams.com/video/TT9JL2yaIOA/video.html