Tool guitarist Adam Jones has shared a demo of the track "Descending" from the 2019 Fear Inoculum
Jones also wrote about the songwriting process, “Writing songs, Justin [ Chancellor ] and I usually bring potential riffs and demos – then the three of us tear them apart like wolves, while [ Danny Carey ] shakes it up with super drumming in the opposite rhythm (which really drives everything forward). Justin brought this fantastic 7-beat melody, which is now the main verse of the song. (He called it “bluegrass” as the title in progress)”
“We spent a LOT of time trying to find other cool parts that would work. Eventually, I added the 9beat and a chorus. Then we arranged the intro – which came about very naturally over time. The two guitars were recorded on the left and right, so feel free to use headphones,” the guitarist concluded.
Check out the excerpt from the demo of "Descending," and below, the final version of the song:

