The Retro Sky incorporates a Phillips SA571 Compounder for smooth feedback. With Over 1000ms of delay time and almost infinite repeats the Retro Sky is perfect for ambient and psychedelic Rock. On top of that, it has an analog Phaser built in to make those long trails swirl.
Engage the Phaser on with the small toggle switch. You can control the speed of the Phaser effect with the Rate knob. The mix knob controls the Delay signal level and can make it accede the dry signal level. Set the Delay time with the Delay knob. The Repeats knob controls the number of repeats, from slap-back echo to self-oscillation.