PITCH: -12.00 to +12.00; Default 0 This represents the amount of pitch shifting that will take place on the first regeneration of the delay. The decimal represents cents. So, a setting of 5.77 would mean 5 semitones (5 half-steps) and 77 cents. Consecutive regenerations will shift by the same amount, resulting in ever ascending or descending regenerations.
FEEDBACK: 0 to 100; Default 30 This is the gain of the feedback loop. If you want more regenerations and a longer delay effect, turn up the Feedback.
REVERSE: On/Off; Default Off This reverses the regenerations to give a backwards guitar effect.
Waves Guitar Tool Rack User Guide.