Other all n4tural
Clyfford Still, Untitled (PH-118) - 1947, oil on canvas

haphazard video (no sound): youtu.be/TkUnvC64ntA
description to follow, gotta run

the red, green, blue values of a pixel determine the position within a sample (first 20 secs of J.S. Bach, Brandenburg Concerto No. 2, II. Andante)
we scan the image top down, fading to grey