You can do this using the RCV MAP option in System settings. You can map a Program number (0-127) to any patch. As default, 0-19 map to the 20 presets starting at 1:1. So yes it is possible using Midi. I thought about the Aux switches, and assigning one to change the values, but then what it sounds like depends on the mode you are in, so that makes it redundant. Hope this helps.