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I just got the Mamboberry LS+ and it is an absolutely incredible board.It is so much clearer than the IQaudio DAC Pro and the HiFi Berry . I've been reading about the use of The Allo Kali Reclocker board with this DAC for even better sound. The Mamboberry already has its own oscillator crystal, the Xpresso Clock. Am I really going to hear a difference if a re-reclock the i2s signal? I have done some research on the effects of jitter and from what I have found I'm going to say I have always had a jitter problem up until now.
Jitter is easier to explain in technical terms than to actually describe in terms of sound. This is what I have found and some of my own observations...
-I noticed when I started burning CD-Rs, back when that was a thing, that the copy sounded identical to the original, but was often unpleasant to listen to depending on the media, burner, or speed I used. The copy just sounded "blurry" especially during a long listening session.
-I had an Onkyo CD player that always sounded amazing during the last 25% of the CD. The first 75% sounded good in short bursts, but seemed harsh with an invisible layer of static during long listening sessions.
-Most USB DACs no matter how well built probably have huge amounts of jitter. At least synchronous dacs for sure. I had all the way up to $1500 DAC and they all sounded like crap compared to what I am hearing now. I noticed that the level of crappiness varied widely depending on what computer is was using and even which USB port I used on the computer.
-Jitter is not very noticeable in the lower frequencies. This could explain why music like rap and R&B often sound good on the crummiest systems while other genres that focus more on mids and highs sound awful.
-It feel like I can "see" into the music more. Like tiny details that were masked by digital noise are now visible. Little sounds I didn't even know were there are now jumping out at me.
-I'm hearing music that is very smooth and seems to flow effortlessly from my speakers.
-Listening fatigue is nonexistent. The hours seem to melt away as I listen to album after album.
-Anyone that favors analog has clearly never heard low jitter digital. Its all of the warmth, openness, and pleasure of analog, but with fine micro details that even the most expensive analog sources would kill. Things like very light cymbal strikes and every subtle nuance of the vocalist's voice.
The benefit of extreme jitter reduction seems like many other subjects in audio - highly disputed. I've reached no conclusion regarding continued jitter reduction aside from the general notion that if something is undesired in high quantities, then continually reducing it cannot be a bad thing. However, just as with harmonic distortion reduction, how low is low enough to be imperceptible? Is zero harmonic distortion really required? Are femtosecond levels of jitter really required? Some of the most highly regarded DACs actually utilize little no audio band jitter reduction. Audio Note and Ypsilon come quickly to mind.
Part of the difficulty with DACs is that they contain so many interrelated functional mechanisms that it can be very difficult to assign a given subjective listening artifact correctly to a single objective mechanism. One sign that may be trying to do that is when we percieve further reduction in some already vanishly low error parameter as perceptible.
Very cool - i use raspberry pi with Moode os and i love it. It would be great to simplify my second system. I hate having a bunch of boxes, power supplies, and cables. What are you using for a power supply?
It was a little expensive compared to other parts of the PI setup, but its built like a tank and provides really clean power.
"I had an Onkyo CD player ..... but seemed harsh with an invisible layer of static during long listening sessions."
Did this CD player have 24/96 or 24/192 upsampling? This is the very phenomenon I noticed with asynchronous upsampling......
been using a jitter box (Monarchy Audio DIP) for more than 10 years now. Low jitter is important and I have found the improvement something that can't be lived without.
I personally think preserving the "jitter signature" of the original A/D conversion sounds better than reducing the jitter to the lowest levels possible......
I personally don't care to listen to entire Music Genres of recorded music if I know that generally high levels of Jitter are "Par for the Course"in how the music is recorded.
Acceptable recorded Jitter doesn't exist in my vocabulary. I guess everyone has to decide for themselves what they consider to have been avoidable & wasn't "addressed" at the recording stage.
How would you ever know this?
"How would you ever know this?"
I don't know.... But I think (believe).... Stated this in the comment.
I believe so because my experiences with digital re-clocking have not exactly been positive..... I've often tried it, and come to the realization that it made the sound worse.
The belief was reinforced by whenever I tried copying CDs..... The CD copies usually sounded worse with the "jitter reduction" turned on relative to being turned off. (The best sounding copies were done the "on the fly" method, where the data is transferred directly from CD to CD-R, without an intermediate step copying temporarily to hard drive.)
The belief is more experience than hard fact. There could be other phenomena going on that could account for this. (So I could be wrong.) But I have come to the conclusion that for me, the best re-clocker is no re-clocker.
try 2 DIPs in series. It's even better. I'm told a 3rd is an improvement too but you have to listen carefully.
I had two but one broke. There was an improvement but not as much as going from zero to one.
Lucky me I was able to find a used one of this unit at my local high-end dealer. It still serves its purpose excellently well after all these years.
If a thing's worth doing, it's worth doing well
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