I've got a Roland RS-50 (I was going to post this in the Roland section but it's a ghost town). Certain patches play much louder than others. When playing out live, I try to adjust the volume when I know the next patch is going to be louder or quieter than the previous one, but it's not a reliable workaround and it takes the sound guy a few seconds to adjust my levels. I'm told there is a way to adjust the levels on the patches I use so they are all pretty much the same. Anyone have a clue?

Thanks.