▁mix er , ▁which ▁includes ▁an ▁internal ▁compress or ▁circuit . ▁ ▁Like ▁all ▁AR P ▁synth es izers ▁of ▁this ▁series ▁( 2 8 0 0 ) ▁its ▁true ▁character ▁opens ▁up ▁with ▁select ive ▁use ▁of ▁the ▁optional ▁foot ▁ped als . ▁▁▁ ▁The ▁Qu ad ra ▁uses ▁the ▁typical ▁AR P ▁orange ▁and ▁black ▁color ▁scheme ▁of ▁the ▁company ' s ▁later ▁years ▁including ▁the ▁orange ▁le ather ▁end ▁pieces ▁and ▁the ▁clean ▁X LR ▁out ▁for ▁DI ▁console ▁recording . ▁ ▁Notable ▁users ▁Notable ▁users ▁of ▁the ▁AR P ▁Qu ad ra ▁include : ▁ ▁Joe ▁Z aw in ul ▁of ▁We ather ▁Report ▁on ▁album ▁ 8 : 3 0 ▁track ▁ 8 : 3 0 ▁▁ ▁Tony ▁B anks ▁of ▁Gen esis . ▁First ▁appeared ▁in ▁his ▁Gen esis ▁work ▁in ▁ 1 9 8 0 , ▁not ably ▁in ▁the ▁songs ▁Be hind ▁the ▁L ines , ▁Ab ac ab ▁and ▁M ama ▁ ▁Ker ry ▁Liv gren ▁of ▁Kansas ▁ ▁Paul ▁Davis ▁ ▁John ▁Car p enter ▁ ▁Rick ▁Wright ▁and ▁David ▁Gil m our ▁of ▁P ink ▁F loyd ▁ ▁Ray born ▁H uff ▁of ▁David ▁and ▁the ▁Gi ants ▁ ▁New ▁Order ▁ ▁References ▁ ▁External ▁links ▁ ▁S OS ▁Review ▁ ▁V int age ▁Syn th ▁ ▁Son ic state ▁ ▁Category : AR P ▁synth es izers ▁Category : Anal og ▁synth es izers ▁Category : Pol y ph onic ▁synth es izers <0x0A> </s> ▁Marsh al ▁of ▁C ri pp