In earlier versions of FL Studio, Launchkey MK3 or Launchkey Mini MK3 can be used as a generic MIDI controller:

• Getting Started With Launchkey MK3 // FL Studio Setup
• Getting Started With Launchkey Mini MK3 // FL Studio Setup

• Launchkey MK1 is supported since FL 11.1.1 RC 3:
  forum.image-line.com/viewtopic.php?f=100&t=129772
• Launchkey MK2 is supported since FL 12.2

You can find the FL scripts (and the USB driver if you are on Windows) on our Downloads page: 
https://downloads.novationmusic.com/novation

Setup:

1. Without opening FL Studio, connect your device to your PC via USB. Wait for Windows to install the device and say it's ready for use.
2. Open FL Studio and go to MIDI settings (F10). Enable all Launchkey devices in the MIDI input list. The corresponding input and output port numbers will be auto-detected.

Operation

• MODE (InControl): Switch between clip launching and controller layouts or drum pad triggering mode.
  
  
• ZONE: Knobs navigate the playlist zone by one clip/track increments.
  
  
• OVERVIEW: toggles an overview display of 9 vertical zones on the top row of pads, performance settings page plus 8 controller layouts on the bottom row of pads, press a button to jump to the corresponding zone or layout.
  
  
• SCENE: triggers vertical columns or grouped clips.
  
  
• +SCENE: triggers vertical columns or grouped clips but adds to the existing playing clips where applicable. (Hold SCENE and +SCENE together for SAME MODE: triggers only clips in tracks that are set to the same Press mode.)
  
  
• GLOBAL SNAP: will use FL's global snap setting instead of the per track Trigger snap setting.

Keyboard, knobs, faders and buttons, MIDI channel selection

Launchkey Mini: Hold the MODE (InControl) button to go into MIDI channel mode, and press a pad at the same time to set the keyboard (in any mode) and knobs (when in drum pad mode) to the corresponding MIDI channel.

Launchkey 25/49/61: Hold both Track buttons to go into MIDI channel mode, and press a Track button to set the keyboard (in any mode), knobs, faders and buttons (when in drum pad mode) to the MIDI channel displayed on the LED readout.

Select up to 16 instrument channels in the FL Studio Channel rack at the same time, set a MIDI channel on the Launchkey and the keyboard will control the corresponding FL instrument channel.

Each MIDI channel allows the knobs, faders and buttons to be linked to a different set of parameters in FL Studio.

In drum pad mode, the pads always send data on MIDI channel 10.

To link knobs, faders or buttons to parameters in FL Studio, right-click the knob or fader on the interface (or select Browse parameters from the Plugin options menu on the top right of the plugin window and right-click the corresponding parameter entry), select Link to the controller, enable Auto-detect and move the knob, fader or button you want to link it to. Use the Multilink option to link many parameters more easily.

Mixer control (Launchkey 49/61):

Turn off the first 2 'InControl' buttons for the faders and knobs and focus the FL mixer window. The 8 faders are auto-linked to track 1 to 8 volume and the 8 knobs are auto-linked to track 1 to 8 pan. Change the keyboard output MIDI channel to control the next 8 tracks' volume and pan. Alternatively, you can manually relink knobs and faders to other parameters instead.

Delete the Launchkey mapping file from this folder to remove the generic links to mixer volume and pan completely:

Program Files\Image-Line\FL Studio 12\System\Config\Mapping\Generic\Controller presets

Pitch bend and mod wheel (Launchkey 25/49/61):

Right-click the channel pitch knob at the top of any channel settings window in FL Studio. Select Link to controller. Enable Auto-detect, keep Omni enabled, and move the pitch bend wheel to link it. The pitch bend wheel will now control the pitch of the currently selected channel. Save a start template project with this link if needed.

For plugins that use a specific mod wheel input, select Browse parameters from the Plugin options menu on the top right of their plugin window. Scroll down in the browser and right-click MIDI cc 1. Select 'Link to controller', enable Auto-detect, enable Omni if needed, and move the mod wheel to link it. For plugins with no specific mod wheel input, right-click any parameter directly, select link to controller enable Auto-detect, and move the mod wheel to link it.

Controller layouts:

Jump to a controller layout from the bottom set of pads in OVERVIEW mode. Each set of pads has a different function. The first pad in OVERVIEW mode corresponds to the Performance mode track settings page. Press pads to change the trigger sync of a specific track for example. The next 8 pads in OVERVIEW mode jump to one of 8 controller layouts:

• Transport and tempo controls
• Switch controls
• Increase/Decrease controls
• Gross Beat controller
• Slicex notes
• Aeolian notes
• FPC notes
• Chromatic keyboard

To link pad controls to parameters in the same way as described for knobs and faders above. To link the Gross Beat controller right-click the Gross Beat Slot selector, select 'Link to Controller', enable Auto-detect, and press a pad on the Gross Beat controller layout.

Transport and tempo pad layout

Tempo up 0.1 BPM - Tempo up 1 BPM - Tempo up 5 BPM - Nudge tempo up - Tap tempo - Undo up - Channel up - Record - Play
Tempo dn 0.1 BPM - Tempo dn 1 BPM - Tempo dn 5 BPM - Nudge tempo dn - Wait for input - Undo dn - Channel dn - Metronome - Stop

You can create your own layouts by editing text files. More information is here.

FPC mapping

When in Drum pad mode, to match the layout of pads on the Launchkey to the pads of the FPC drum plugin, select the corresponding mapping from FPC options > Layouts: