question: what is this "classic" attribute on the noise~ object?

hi! i finally have a question i can't find the answer to anywhere(i checked reference page, help file, and also did a quick search on the forums here(also searched, "classic mode noise~ object max msp" on google... nothing), also visualized it using the setup within the plot~ helpfile's 'spectral' tab, checked it in spectrogram object, and fabfilter Q3's visualizer, i can't tell visually either)...
(i'm trying it out, i don't think my ears are subtle enough to notice a difference by themselves either.. but perhaps when using it to create a hi-hat sound recently, i noticed switching between the two seemed to create more higher-frequency presence in 'classic' mode(?)... by ears alone... i'm guessing 'classic' had some older interpolation or none at all, allowed more digital aliasing?... not sure, tho)
anyone have any idea what the 'classic' attribute on the msp noise~ object does, how does it change the way it generates white noise?