Kergor-1 is a MIDI VST tool designed specifically for use with the Korg ER-1 hardware . The ER-1 sends NRPN MIDI messages and the Kergor-1 plug-in translates these so that you can use it as a MIDI control surface (you can have 62 classic MIDI controllers (0 to 127)). There is also a tuner for each pad, channel change and editable labels for each controller.