You do not know what to do when you get a VST software for which it is impossible to assign MIDI controls. VST MIDI Control Extension solves this problem. It can assign one of the 127 channels to a MIDI control event of your VST or to a virtual control element. It can fix routing errors upon a software installation or loading. It also has specific patches for every MIDI controller available in the market. Therefore, download if you have a problem with MIDI controller.