Sometimes the drums sounded like they were replayed through a clock radio and then miked direct to the board.
Also BIG reverb on some of the bass lines as well as keyboards.
Compression on vocals that could be mistaken for tape over saturating...
This said, they are studio albums (never to be mistook for live or open room recordings) and all of this manipulation ended in an award winning sound for the time.
I've never listened to them on CD, just LP and though
DeKay