When triggered, returns a random index value based on array as a list of probabilities. By default the list of probabilities should sum to 1.0, when the normalize flag is set to 1, the values get normalized by the UGen (less efficient).
The trigger. Trigger can be any signal. A trigger happens when the signal changes from non-positive to positive.
The list of probabilities. (Note: These should be control rate only.)
Controls whether to normalize the probability values. (Control rate only.)