It's all digital, except the distortions, which are analog, according to the manual.
Very easy to use. Really awesome.
The compressor is very good and, especially, silent. The delay and chorus are very good, just like the reverbs.
The flanger is a bit less precise and watch out for extreme settings, because the sound turns muddled.
The distortions aren't really bad at all.
I've been using it for 17 years
It's awesome for clean sounds, but not so for distortion, although you can always add distortion pedals before it.
In short, a relic, not uninteresting for fans of clean sounds, if not expensive.
It lacks a phaser, though.