aliasing explained

this is the best explanation i've found on the phenomenon known as "aliasing" aka "the reason digital sounds different than analog" aka "why the microkorg sounds fake as fuck." makes me wonder about the age old question: is there a difference between a DCO and a VCO (besides the fact that a VCO is less stable and drifts around)? is it the digital filter and amp stages that make virtual analog sound so shitty, or the oscillators?

Korg MS-20 Analog Filter for $70

I know it sounds like i'm a korg sales rep sometimes, but damn.

This little beast is a fun portable analog oscillator connected to a ribbon controller and run through the same filter as the MS-10 and MS-20. Nice, yes, for a toy. But the real magic is that you can run external audio through the vcf. This hooked up to any old yamaha portasound or whatever would be beastly, almost as beastly as the boner I have for analog filters.