Al, what I don't understand is this: if regular Red Book CD sounds so good, and "it is where all the music is", then why have there been so many attempts to improve digital sound? There are so many alternatives purporting to be "higher resolution" and now there is MQA. DACs like the Vivaldi have filters which change the sound too. Why have designers invested so much time and effort in trying to improve ordinary CD sound? Surely some folks don't think standard CD is good enough.
You and I have heard a few excellent DACs, the Vivaldi, Rossini and now your Schiit. I agree that these sound very good, and yet, and yet, standard CDs, even with ever improving playback implementation, don't seem to be good enough. What do you think drives the dissatisfaction?
Peter, I think if in 1985 we had had CD sound at the quality as we can experience it now in in 2017, the whole high-res vs. CD debate might never have happened. My guess is, if you were to ask people with knowledge of the state of the art (SOTA) at every step, many of them might tell you that SOTA playback of CD in 2017 is of better sound quality than the best playback of SACD one or two years after the release of the format around the turn of the millenium, when SACD was widely hailed in HiFi magazines as the beacon of light that would save us from the (allegedly) irreparable vices and shortcomings of the CD medium (that SOTA playback of SACD in 2017 might be better still is a different matter). Point is of course, above a certain format minimum it is all a matter of implementation of the format rather than the format itself.
While the Redbook CD format may not quite fulfill the theoretically minimal requirements of absolute transparency to source, I assume that it is very, very close to that (at least if I correctly understand digital theory, which becomes vindicated in practice more and more). Some would say that theoretically the CD format is fully transparent -- there is a debate to be had of course. What seems clear is that in practical implementation we haven't even yet reached the theoretical potential of the CD format. dCS for example, who are at the forefront of digital SOTA implementation, admit as much when they describe in their manuals the diverse practical trade-offs of the several filters that the listener can choose for playback. And still, with the right recording/ mixing/ mastering CD already can sound so incredibly good. Yet even with that currently obtainable fantastic sound quality, there is absolutely no reason to assume that quality of CD playback will not improve further.
So-called high-res may, even when CD will some day be implemented to an optimum in the future, still have a slight edge over CD (again, debatable). Yet as I see it in the hindsight of 2017, high-res formats really were mainly just a band-aid to fix problems in practical implementation of digital in general. High-res just has much more of a technical buffer zone within which shortcomings of practical implementation may be hidden, while the CD format is just on the edge of theoretical minimum requirements even when optimally implemented. That seems to be the main reason why in practice high-res formats have often sounded better than CD, much more so than (alleged) shortcomings of the CD format itself. In that context, it is well known that SOTA implementation of CD playback is still better than high-res on lesser DACs.
Is the 16-bit container of the CD format good enough? It may very well be. Yet in order to avoid 'slipping over the edge' when it comes to losses of resolution upon mixing/ mastering, working in hi-res at 24 bit or higher during these processes is certainly beneficial and is practiced widely these days. In this application, manipulating digital data before they hit the storage medium of CD, high-res is certainly useful without a doubt.
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In practice, for whatever reason (shortcomings in file server, system configurations listened to, or others), the best digital playback that I personally have heard thus far was from Redbook CD over transport. And it is stunning. You of course have also had some of your best experiences with digital from CD playback.
I also question the differences people hear in formats is due to the format and not the way the DAC handles the conversion, even if it's the same DAC doing multiple formats. It's hard to say if results would be the same with a different DAC...
Very good point. A few years ago, before I bought the Berkeley DAC, I auditioned two cheaper, well regarded DACs, and was gravely disappointed that my then 20 year old Wadia 12 DAC squarely beat them in some areas, such as drama, liveliness and freedom of coloration (these DACs were better in the bass, for sure).
Then I heard that a number of cheaper DACs these days are actually optimized for hi-res
at the expense of 16/44, which would explain the puzzling letdown against my old Wadia DAC on Redbook CD.