How to tell if a CD is Encoded?


 I recently bought a boxed CD set of Beethoven’s Symphonies (von Karajan’s 1963 recordings, on DGG), and cannot find any information on the digital encoding,  either on the CDs or the Internet. Is there a simple way to determine whether a  CD was recorded as PCM or DSD, and at what sample rate (my DAC does not display this)?
128x128cheeg
If a disc says "Remastered in DSD", doesn't that mean the contents of the disc are encoded in DSD?  If not, we really need to establish a lexicon.

@folkfreak -- you said you "listen to my red book upsampled to dual DSD" -- I don't understand.  If a disc is encoded as Redbook (16/44.1), that means a 16 bit sample of the analog waveform was taken 44,100 times a second.  How can you get better sound out of that track by upsampling -- aren't you limited to the resolution of what's on the disc?
Not at all @cheeg. Consider an analog pressing of an LP that says "remastered on a vintage Neve console from the original master tapes" that doesn't mean you're getting a tape, it just describes the techniques the mastering engineer used to create the final mix.

It's exactly the same in digital. When SACD first came out and DSD A/D became available it was a selling point to say "mastered in DSD" (such as the Rolling Stones issues that were mentioned) and many CDs and LPs were sold on this basis.

As to the value in upsampling -- agreed you cannot create information that doesn't exist but there is much logic to a higher sample rate in terms of the avoidance of the need for certain deleterious filters, and not least a better fit with your D/A. In a full DCS stack, as I have, you can try any combination of input and output rates you like and select what sounds best to you.
Fascinating -- thanks for the explanation.  Can you recommend a good book that covers these topics?
That's a good start -- I have never seen this topic described using visual analogies, and it is much easier to understand the concept that way.  Thanks again!