Absolute top tier DAC for standard res Redbook CD

Matt,

Alex, you definitely lost me on your last post, but I am truly enjoying the back and forth between you and Steve (as long as it stays civil and collegial). I am learning a ton!!!

I know it was a bit more technical. What I tried explaining to Steve is that the DAC chip from Analog Devices he is using still oversample CD data by a factor of 2, even with he 192 option selected. His claim that with 192 option selected there is no oversampling is not exactly correct, at least to my knowledge.

Further more, oversampled in the PCM domain or not, the PCM data from your CD-qulaity source is still converted to something very similar to DSD inside the DAC chip. The Analog Devices converters used in the Aeris and ODSE use the so called Delta-Sigma modulators that convert PCM to a signal similar to DSD but with higher order, so the noise is kept way out the hearing range. With Steve's 192 option selected for CD, the combined digital filer and modulator speed is reduced with a factor of 4, resulting in a noise figure that is a lot closer to the hearing spectrum. This is the reason why I said that it emphasizes the midrange more than the usual. Of course, this is to my knowledge and experience that I believe to be the truth.

If someone here with a better technical expertise can prove me wrong, I will be happy to learn something new.

I would ask all involved to make an effort to highlight their own gear's strength's and not point out any other DAC's weaknesses. Specific descriptions of what tech is used and why you think its best are fine. Let's avoid mud slinging though…

Here is a summary of the DSD-S features that highlights its strengths, as requested:

1. Proprietary XMOS based USB input module accepting up to 384/32 PCM as well as DSD64 and double DSD128.

2. Femto jitter master clocks.

3. Proprietary PCM to DSD encoder with DSD64 and double DSD128, user selectable.

4. Proprietary paralleled DAC module working in a special mode that achieves a better overall sound quality without sacrificing anything.

5. Completely lossless hybrid attenuator working in pure DSD and analog domains, without conversion to any sort of PCM.

6. Pure Class-A output stage with MOSFET devices with no negative feedback and no OpAmps.

As pointed out so many times already, at the end of the day, it all comes to a certain synergy in a certain audio system. So specifications are not always a ticket for the best sound in a given audio system.

YMMV!

Best wishes,
Alex Peychev
APL Hi-Fi

Matt, yes, The Aesthetix digital products use the X-Mos chip and the Burr-Brown 1792A chips, I am very familiar with all vesions of the 1792 Dac chips, owned a few, hope this helps.

Alex-APLhifi-usa, Hi, your attenuator-volume control appears to be very similiar to the one that Aesthetix impliments when Bought in the Romulas and Pandora digital products, congrats on a very good volume control, this is what I am saying, The technology these days with attenuator-volume controls in some digital products are closeing the gap, if not better, with performance versus an active pre-amp.

08-08-14: Audiolabyrinth
Melbguy1, welcome to this great thread, are you going for the vitus player?

Thank you kindly AL! You guessed right. I plan on upgrading to a Vitus Signature Series spinner (SCD-025) for synergy with my SIA-025, though i'm waiting on a new DSD USB board to be released in a couple of months. Imho it is the most musical sounding single box player in the world, but of course is not cheap!

@Lula: I do think the Signature upgrade is a major improvement with respect to redbook; however, IMHO the upgrade cost is not inexpensive. I probably would have a difficult time justifying the cost solely for redbook, but I have a pretty extensive collection of DSD that I really enjoy, so the DSD capability was my primary motivation. My decision was made much easier by being able to purchase a demo Romulus from a dealer going out of business at a great price.

I'm not a good candidate to critique the transport capability as I very rarely use it--99.9% of my use is solely as a DAC--I would have bought the Pandora and saved the extra cost but for the great deal on the demo Romulus.