FEEDBACK: 0 to 10; Default: 5 This is the gain of the feedback loop. If you want more regenerations and a longer delay effect, turn up the Feedback. Turning the feedback above 9 can result in unruly effects!
HI CUT: 0 to 100; Default: 75 The Hi Cut control will shut out high frequencies. It has a resonant overshoot so setting feedback above 87 may create a peak growth that can result in a clipping, shrieking feedback.
STEREO: 0 to 100; Default 50 At 0, this is a Mono sounding effect. At higher settings, the “ping pongs” move away from the Center, all the way to a full discrete Stereo ping pong at a setting of 100.
Waves Guitar Tool Rack User Guide.