This album will do two things: 1. It will change the way you perceive rock in general; 2. You will be able to understand where all rock from 1969-on came from. It's that good. Disc 1, "In The Studio" has the classic "White Room". If you're reading this review and have never heard this album, and are thinking of buying it, then imagine how you can take a basic one-chord riff, as in Disc 2, on "Spoonful", for 18-plus minutes, and twist, contort, mold it into a type of improvisation that is rarely (if ever) heard today. Just buy it. You won't be disappointed.