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In Reply to: RE: DAC's Which Convert PCM to DSD posted by Mikey8811 on March 14, 2016 at 23:50:56
The New Mytek Dacs ( Manhattan, Brooklyn ) may convert PCM to DSD.
Actually, the Manhattan does, Brooklyn, not sure.
The Software works great, IMO!
The Software is cheap, the Manhattan is $5000.
I use Mytek192/DSD and Lampizator DSD Euforia Dacs, w/HQ,mostly.
It would cost a lot to upgrade from what I have already.
Follow Ups:
DSD refers to 1 bit PCM at an oversampled rate, typically generated by a sigma delta modulator. Most DACs that use a sigma delta modulators do so in a chip and the output of their modulators has more than one bit, e.g. in the case of the SABRE chip 6 bits (8 channel mode) or 8 bits (2 channel mode). SABRE chip DACs (and others using similar chips) are not DSD DACs, because they use more than one bit.
Tony Lauck
"Diversity is the law of nature; no two entities in this universe are uniform." - P.R. Sarkar
Edits: 03/29/16
Many DSD DAC manufacturers, including MyTek, floated the notion of Multi Bit DSD.Michael, from Mytek:
"1) Multibit DSD is not PCM.
PCM is typically 24 bit of the whole sample value while multi bit DSD is typically 5-6 bits of DIFFERENCE between adjacent samples. In 1 bit DSD this difference is binary(0 or 1) while in multi bit DSD it's the same difference between samples but quantized with 5-6 bits (Sabre has a 6 bit DAC). Multibit DSD is BETTER than 1 bit DSD, so there is nothing wrong with going 1 bit> 6bit which is what all these DAC chips do.
2) The " purity of 1 bit " is a marketing spin resulting from how DSD was marketed by Sony, but it's not 1 bit that makes it sound good, but it's nature. What makes DSD sound good is the conversion method (differential btwn samples- not the actual sample) and no digital filters , it's simply cleaner. 1 bit DAC conversion has the appeal of simplicity (perfect linearity theoretically) in the early 2000s. We are now well past that with performance requirement. We need more bits to resolve detail better.
3) All PCM conversion today (99% of ADCs) is a derivative of multi bit DSD.
PCM is always a subset of that, so naturally it can only have less information, not more.In our latest experiments PCM has to have at least 32 bit to compete with DSD low level resolution and 352kFS to compete with lightness of DSD.
In the experiments with our newest prototype ADC, when we reduce wordlength of ADC from 32 to 24 bit, signal deteriorates."
Edits: 03/30/16 03/30/16 03/30/16
DSD is generated by a sigma delta modulator (a.k.a. a delta sigma modulator). These do not output differences between "samples". These output a string of samples, one at each clock tick. The samples are made from the output of an integrator. The integrator is fed with the difference of two analog signals, the input waveform and the output of the previous sample. This is a complex process with non-linear feedback. It is not a simple difference between input samples. (That also exists, but is called "delta modulation" as opposed to "sigma delta modulation".)
Tony Lauck
"Diversity is the law of nature; no two entities in this universe are uniform." - P.R. Sarkar
Correct me if I am wrong, the designer of your DAC is perfectly ok with multibit DSD and the Sabre chip.
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