DCP Productions Motif XS Owner's Manual page 73

ARP 2600.
H10 – Prophet UFO
Pitch/filter sweep "UFO landing: sound, good for sci-fi effects, as
well as the intro on Styx's song "Too Much Time On My Hands".
Typical of the kind of sound produced by the Sequential Prophet 5's
"poly-mod" section (see next voice description).
H11 – Prophet Poly-mod
I loved the Poly-mod section on the Prophet 5. Because I love big,
noisy, gloopy, ring-modulated metallic slabs of industrial audio. Which
was what the Poly-mod feature delivered, in spades. You could also
use it with more subtlety, to add a brush of metallic edge, or a furry
dash of modulated bleepiness.