If "correctly" means "transparent" then my criteria is pretty loose and a Realtek will pass, but if people do measurements and zoom in everything as close as possible then ultimately differences will show up.So are we saying that with a correctly band limited signal we will recreate the original signal correctly?
https://hydrogenaud.io/index.php/topic,114871.0.html
Some DACs have excessive high frequency roll off and a upsampler can solve the issue.
http://archimago.blogspot.com/2015/08/measurements-ponoplayer-another-mans.html
Also this:
https://hydrogenaud.io/index.php/topic,110058.0.html
I have a feeling that some DAC designers deliberately use some potentially nontransparent filters in order to convince their customers that their products are good enough to demonstrate the benefits of hi-rez.