A method for humanizing a music sequence, the music sequence comprising a multitude of sounds occurring on times comprises the stepsgenerating, for each time a random offset ,adding the random offset to the time in order to obtain a modified time ; andoutputting a humanized music sequence wherein each sound occurs on the modified time. The system has a weighing unit for measuring weight of material conveyed on a span of the conveyor and a speed monitoring unit to monitor the speed of the conveyor. The freely mounted roller members are so mounted that the rollers are in alignment with each other and rotate in the same direction.