The control surface is modular in design. Start with a Selector wedge and add as many fader wedges as you need. The digital technology behind the Numix allows most features to be assignable. Faders are no longer tied to just a few inputs. This means smaller, less expensive hardware can still get a big job done. The surface is as flexible as you choose. Faders can be limited to just one or two inputs or can access up to every input and output on the Audio Engine.