@jimob Good for you Jim. Digital has finally arrived big time!
.? Digital Reclocking and syncing clocks does anyone know the correct Answrrsb
Hello To all ,many Audiophiles I have found do not even know what a Digital reclocker is, and what does it do exactly , and how it helps the incoming signal.
and the Bigger question is Syncing the clock to Dac.
for example with Denafrips Reclocker , the most versatile I have seen with input outputs especially from Hermes, Gaia DCC reclockers most inputs,outputs, they have both 45,and 48 MHZ for clock sync. ,other dacs clocks may use 5-10 MHz ,this gets a bit confusing.
Here is a big question , say you have a very good dac with over clock ⏰,
Is there any advantage to syncing clock say from cheaper Iris DDC reclocker ,to the very good say Terminator oven controlled clock. The Big question is how does this work? Does the better clock in the dac dominate or influence the lesser clocks ?
or don’t bother syncing clock with cheaper Iris DDC ? Do you have to have a reclocker with = quality ⏰ clock to the dac to make it a Sonic improvement ?
these are the questions no one I know has been able to answer with absolute knowledge.
just the reclocker itself is worth wild for. It filters and cleans the incoming digital signal ,through usb,BNC,or coaxial cable, then reclocks signal to dac to have a pristine signal to read.. in this respect even a good basic reclocker like Iris would be very good ,on pontus and even Venus dac ,and Holo springs worked well
for $600, next Big step the $1250 Hermes better everything including oven controlled clocks ,if you can afford it. Syncing clocking is the big Question is there any benefit going from a lesser Iris clock in the Iris DDC reclocker syncing clock to say a Terminator + with far superior oven clocks?Is there any benefit ? If so why ? Thank you to Anyone who may have the expertise to logically explain this.
Hopefully Alvin Chee will see this ,Happy listening to your music .🎶 🎵
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What I meant to say is the digital stream is never perfect, But the much more costly units have many ways to correct Jitter or timing errors , this too is where a DDC -Digital to Digital converter to clean up the incoming digital stream and eliminate timing errors before it goes out to the dac , the easier the dac can read the less error correction s needed , On the better units they buffer the signal ,like ram ,there there is FPGA ,it’s exact implementation is above my Digital pay grade ,I just want to get the most natural presentation without breaking the bank for myself the Terminator-2 and a good DDC reclocker is good enough for me for the next few years , this too can be improved upon. I just installed a dedicated 20 amp line dual ground, now maybe a few grand for a power conditioner, better power cords , better 75 ohm BNC cables to sync the dac reclocker, and better I2S cable, better ,usb cable ,better Ethernet cables ,Everything counts, where does it all end ? Being an Audiophile maybe it doesn’t !! |
LordMelton you are correct your 👂 ears are the best measuring tools graphs and specs do count when designing ,but there is ways to smooth out a ripple or spike ,and smooth things with oversampling FPGA ,the final result is how does it sound to reality ,and your audio system ,as well as room will influence the sound .Sound is just a movement of frequency in the realm of time . The Moody Blues Classic nights in white satin in the orb summed it up best - We decide which is real and which is a illusion !! |
I am always wary of entering this swamp, but the huge elephant on the table comes from music theory - dissonance and consonance. Its just plain mistaken to correlate " enjoyment" with "lest distorted, overall. 1. People's tastes differ 2. People's hearing differs. Many in our (and i step into muck here) hobby are old men and have high frequency hearing loss. Is a flat response best for them? BTW many old rockers have tons of HF hearing loss and IMNSHO master records accordingly. bright! 3. Consonant distorion can sound good. Its disortion, but enjoyable. 4. Dissonant distortion sounds awful. 5. Corollary to 3 and 4 - ideally we would have a weighted measurement of distortion - reducing or eliminating the weight of consonance and vice-versa. 6. Now, if ALL distortions go to zero, or close, we ought not to be able to hear them. But #1,2 above might complicate that assertion.
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What you are saying is wrong. There is no jitter on USB of Ethernet inherent in the data transmission. None, nada, zip. There is no jitter or timing errors to correct. That is why low cost DACs, literally ones that cost <$200 are able to do THD+N, SNR <-110db, and IMD, even multi-tone IMD at very low levels. Even with SPDIF, those DACs are able, though PLL receivers and any number of chip based methods reach SNR, THD+N, etc. <-110db. They will even do it with TOSLINK. Cost means nothing. There are a lot of expensive DACs that can't do that. Think of how much experience, and knowledge goes into those DAC chips.
FPGA is just a bunch of fast digital logic. It has no inherent advantage. There is nothing to clean up with USB and Ethernet, and again, with SPDIF, if you are already <-110, or better, what exactly are you cleaning up?
@itsjustme , by Consanant and Dissonant distortion, do you effectively mean harmonic distortion and intermodulation distortion? I could see dissonant distortion also meaning aspects of unpleasant harmonic distortion. When those distortions go close to 0,we don't hear them, but you are correct, we may not like the result. Some people like tone controls, and distortion can also be used to affect tonal balance in a pleasing way. I actively play around with added distortion on my setup, preferring it with some music/listening levels. I just do it in DSP so I can turn it on/off. The LM49720 does not suck. It a properly designed circuit, it is a straight wire with gain effectively. The THD, IMD, noise, etc. is low enough to be difficult to measure. The 1612 is similar. Put it in the wrong circuit, and conceivably it will have issues. They do what they do. They do it very well .... but .... no matter what they claim, a large portion of audiophiles don't want a faithful recreation of the recording, they want something different.
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