Clicking on the field shows a popup menu where you can choose the parameter to control. Parameter: Here you can assign the plugin’s parameter you wish to control with the MIDI CC event.Clicking on the field will open a list of the loaded plugins. Plugin: The plugin that will be controlled by this event.Clicking on the field shows a list of MIDI CC messages from which you can choose. Controller: The MIDI CC message that OpenMPT will listen for to control the plugin parameter.MIDI Control Changes (also known as MIDI CCs) and aftertouch events are currently supported. Event: The type of event OpenMPT should listen for.When choosing Any, it will listen on all MIDI channels for this event. Channel: The MIDI Channel (1 – 16) OpenMPT will listen on to capture this event.Pattern Record: Checking this box will enter the parameter change into the Pattern as a Parameter Control Event, so it is only available in MPTM tracks.Capture: Checking this box prevents the MIDI message from being transmitted to other MIDI Mappings listening to the same MIDI event or even other parts of the program such as any open plugin editors or the pattern editor, where the controller change may be written down as a MIDI Macro command.Active: Checking this box enables this MIDI Mapping.MIDI Learn: When this box is checked, OpenMPT will listen for incoming MIDI events and fill in Channel, Event and Controller values automatically.This is the currently edited MIDI Mapping. MIDI Mapping settings are saved in modules, so they do not have to be re-entered when loading a previously edited module. The modified plugin and plugin parameter are then automatically filled into the appropriate fields. You can open this dialog from the View menu or use the “Learn” mode by pressing Shift while modifying a parameter in an active plugin GUI. This can be useful in a live setup, where a MIDI controller can be used to directly tweak plugin parameters, or simply to directly record parameter changes to the pattern editor. MIDI Mapping allows you to map certain incoming MIDI messages to plugin parameter changes.