gator is a tempo-sync'd probability-based gate, triggering between 2 adjustable volume values
Choose from 8 to 16 steps per bar (measure) and the probability of triggering the gate (from 0% to 100%) for each step. As the track plays, the gate will loop through the steps and randomly trigger depending on the probability assigned to each step.
You choose a lower and an upper volume value, the lower value is the default (unless the invert button is pressed) and the upper value is triggered according to the step sequencer
http://www.delamancha.co.uk/gator.htm
http://www.delamancha.co.uk/plugins/gator.zip