Anti-jitter RAM buffer in DACs, Which have one ? Options

[Pio2001]

In, http://www.tc.umn.edu/~erick205/Papers/pap...html#principles we can read about RAM buffers :

This process is referred to as timebase correction and as stated before, any quality piece of equipment will implement it.

That has been the ritual answer to jitter concerns since I'm on the Internet.

But... if "any quality piece of equipment will implement it", then some non-quality pieces of equipment don't implement it. My question is : which ones ?

The statement "quality piece of equipment" is completely subjective and doesn't give any information. For my grandfather, a "quality" CD reader will be a portable radio-cassette-CD-speakers combo for 100 $ in the supermarket. The "non-quality" one will be the Fisher-Price toy for children from 3 to 7.
For an audiophile friend, the "quality" CD player will be the 25,000 $ Wadia CD Transport+DAC, while any player under 1,500 $ is just worthless crap.

So, do a 200 $ CD Player always have a RAM buffer ? Or is it not considered a quality piece of equipment ? What about a 300 $ CD Player from 1990 ?

[Pio2001]

Could this be it?

http://www.scalatech.co.uk/papers/aes93.pdf

Yes, it might well have been this. Anyway, the informations given are the same. Thank you for finding it.

"Worst case 100% DAC jitter error resulting from a 22 kHz audio signal and a 18.5 kHz jitter. Only 20 ps peak jitter is required for audibility." (page 29)

I doubt that someone can play a 22 kHz sine into his speakers at 112 db and not fry them, and even if I use a 10,000 W soundsystem, I seldom listen to full scale 22 kHz sines.
The problem is that numbers don't guarantee that jitter is inaudible in all cases.