Single box CD players with NO oversampling?

6chac - thanks for your response. Audio Note claims "1x-oversampling" (and NO digital filtering). Is their claim not correct ? thanks -

Frank Van Alstine claims that his "OmegaStar" DAC uses 4x oversampling. Does this mean he is in the same camp as ARC, Audio Note, 47 Labs etc (no oversampling)? this is very confusing. thanks

Why would you want a cdp that did not oversample? I too am confused....I thought the cd redbook standard called for some form of oversampling. Also, Wadia cdp's DO oversample.

If it is 4 times oversampling it is not the same as Audio Note. In addition, The ARC does not use the same chipset as Audio Note or the 47. The Audio Note uses no up or oversampling and no digital filter. The results are astonishing.

D/A convertors do not need to have oversampling to work, it's just that they are almost always implemented to smooth out the filter curve. A pure analog "Brick Wall" Filter can be used somewhere past 20,000 hz with no over sampling. This was done in some very early CD players from the early 1980's. However, this didn't work very well because it caused distortions and artifacts in the audiable bandwidth. To say that the "Basic sample rate... is 4x oversampling" is completely incorrect. I had a 2x oversampling CD player back in 1985. At that time 4x oversampling was a totally new thing. I'm sure a company like Audio Note has found a way to implement an analog filter without causing distortion in the audiable bands.