Did you bother to read and follow the links in post #2?
There is your answer of your miss-used "super"... you where kind of "undressed" in the very first answer in your new *super* thread.
You have a big ego and dont understand your one best. I think it is you that need to qualify yourself instead of posting articles form the web...
//
No technical information about how the device works was provided in the thread, thus there can be no "technical review".
I think I saw something like this before ....
Signalyst DSC1
http://puredsd.ru/
STAR Pure DSD DAC-Signalyst New
Signalyst DSC1
http://puredsd.ru/
STAR Pure DSD DAC-Signalyst New
Hi Kovax,
DSC1 and A&C DSD DAC do belong to the same category of DSD DAC, but the difference is huge. You can see from the photos. First, the difference between resistance and power quality is huge, and secondly, the IV board is also very different. The output transformer used in DSC1 is very cheap, one is only about US$20, and DSC1 only uses very cheap SMD resistors.
DSC1 and A&C DSD DAC do belong to the same category of DSD DAC, but the difference is huge. You can see from the photos. First, the difference between resistance and power quality is huge, and secondly, the IV board is also very different. The output transformer used in DSC1 is very cheap, one is only about US$20, and DSC1 only uses very cheap SMD resistors.
If you have the relevant technical knowledge and you can make comments based on the photos, I will be able to make further explanations and clarifications. Otherwise, I spend a lot of time explaining more details to people who are not interested and don't know the technology. It really doesn't make much sense. I did not provide any purchase channels or price. Obviously, I am not selling the machine. I just want to communicate with people who understand the relevant technology. Maybe I posted it in the wrong place and only attracted people who don't understand the relevant technology?
You will need to justify that statement in maths and experiment. Just saying more bits makes it better is provably dumb.
First. 32bit = 1.2nV = 192dB. Well below what most humans can distinguish..
Second. An R2R DAC has as many resistors as you want (assuming both accuracy, precision and stability). A DSD both single and multi bit can also have as many as you want. They will both have the same technical issues if they're large multi-bit. This is why most use high precision on SMD or resistor arrays on laser trimmed (same IC) rather than single resistors (note at nV you'll find the construction hard).
Third. DSD only needs one bit. Fast. You can quantify and encode in multi-bit, as a quadrature etc, but in the end you only need one bit.
Fourth. The implementation of what is done with those bits is what is important. As the others have stated, show the reconstructed bit stream, noise, distortion and susceptibility to jitter.
Personally I feel that DSD offers a better noise shaping (ie shifting) and a DSD512 is on my list of tube projects..
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So far the only "technical" Info is the ellipse added with paint-shop to a graphic labelled DSD.
So your dac can just decode dsd64 files or also dsd128, dsd256 and PCM?
dsd64 means 64x oversampling (2.3MHz) it doesn't have to do with "bits", there is only 1 bit.
The resolution of dsd64 is comparable at the best with 24bit 88.2kHz PCM.
Usually there is no need to make a dac "musical" just precise.
So your dac can just decode dsd64 files or also dsd128, dsd256 and PCM?
dsd64 means 64x oversampling (2.3MHz) it doesn't have to do with "bits", there is only 1 bit.
The resolution of dsd64 is comparable at the best with 24bit 88.2kHz PCM.
Usually there is no need to make a dac "musical" just precise.
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We are a number of people who strongly disagree with you.... R-2R is technically the best way to reproduce PCM encoded audio, instead of DSD modulation, as the name suggest, delta sigma modulates the audio signal.
Maybe you should turn down the strong and wild claims, your DAC might be ok, but not more.
lmao
From the photos it's an AK4137 board used as PCM to DSD converter (output sample rate unspecified) followed by a 64 tap hardware FIR, I'm betting on 74xx595 shift registers.
This compares bit depth and FIR length, which are not comparable.
For a nice 1-bit DAC, see Putzey's Mola Mola, but he's using a much higher frequency, and I believe the chips are differential output flops...
yunyun, please refrain from posting in others' threads. Cross-linking is frowned upon at diyAudio and will be treated as spam the next time.
But it IS spam and its all i've seen him do. He only ever enters a conversation if there is some way to link it in with something he wants to sell.
Maybe just as well that AK4137 is unavailable for now. The conversion board shown is not well enough designed to get the best performance out of the chip. That much is obvious from the pictures.
Also, the I2S interconnection wiring and layout looks pretty rough compared to the way it should be for good signal integrity.
I don't mean to be offensive by saying the above, but IMHO there is some more engineering that should be done before going commercial with such a project. Sound quality would almost certainly benefit.
My simple answer: R2R can't play DSD at all, R2R can only play PCM, so the sound density of R2R DAC is much lower than DSD DAC, which is why DSD DAC needs more bits, so the sound played by DSD DAC is actually very easy for people to distinction. This is because most people still cannot distinguish clearly the difference between R2R and DSD DAC architecture, so I will explain more again. The other parts are too esoteric. Even if I explain it clearly, I am afraid that many people still cannot understand it.
This is a 32-bit A&C DSD DAC, of course, more bits can also be used. A&C DSD DAC uses military-grade switches, not SMD switches, which can be compared.
The expensive MSB DAC, even if it is R-2R architecture, because of its excellent front-end algorithm, theoretically it has almost reached the limit of the R-2R architecture, and it has a very beautiful sound. Relatively, the current performance of A&C DSD DAC is still limited to Upscaling from PCM to DSD. But if the music signal itself comes from DSD recording, it will have a perfect sound. In other words, we are still trying to develop our own upscaling algorithm.
The I2S interconnection of A&C DSD DAC uses high-cost, high-quality pure silver wire. The machine is made purely by hand, so the seemingly messy layout actually involves tuning.
And in a single sentence, you undermine your credibility. hmmm, I can't pick one, so let's call it 2 short sentences.
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