Hmm…I'm using a Boss FV-50L volume pedal that I've rewired as an expression pedal. It looks exactly like the Roland you have. I have a gig tonight. My bass player has a EB VP Jr 25k volume pedal that Eventide recommends. I'll borrow it from him and see if the problem exists using his pedal. It should take about a minute to determine if the problem is the expression pedal or the TimeFactor. I'll post my findings when i get a chance later tomorrow evening.