Reaper Setup & Troubleshooting: Impact GXP

Impact GX/LX Mini & GXP Support

Important: Impact GXP Reaper integration is compatible with Reaper 4.59 or later. We recommend that you upgrade to the latest version if you have not already done so. These instructions assume you have a compatible Reaper program installed running on either Windows (Vista or higher) or Mac OS X 10.7 or higher.


iiMake sure Reaper is already installed on your computer. If not, please install Reaper first and open it at least once, before running the installer for Nektar DAW integration software.

  1. Download the ‘Impact GXP_Reaper_Support’ file from your Account page after registering your product.
  2. Run the ‘Impact GXP_Reaper_Support’ installer and follow the on screen instructions.
  3. Plug in your Impact controller and make sure it’s switched on (if you didn’t do so already).
  4. Launch Reaper and open the ‘Options’ menu
  5. Select ‘Preferences’.
  6. In the ‘Preferences’ window, select ‘Control/OSC/Web’ (image 1 MacOS, image 5 Windows).
  7. Click ‘Add’.
  8. In the pop-up window, select your Impact GXP model in the ‘Control surface mode’ list. As long as your Impact GXP is connected and switched on, Reaper should automatically detect the correct ports. (image 2 for MacOS, image 6 for Windows).
  9. Click ‘OK’.
  10. In the ‘Preferences’ window, select ‘MIDI Devices’ from the Audio category.
  11. Enable ‘Impact GXP**’ (Windows) or ‘Impact GXP** MIDI1’ (MacOS) for your Impact. The mode should be ‘Enable+Control’. The other two Impact ports should remain disabled. (images 3/4 for MacOS, images 7/8 for Windows).
  12. Click ‘Apply’.
  13. Click ‘OK’.

That’s it, setup is now complete and you can move on to the fun part, learning how it all works!


It is important to only enable port 1 in the MIDI Devices window. If multiple ports are enabled Impact will not function correctly. Make sure your setup mirrors that of images 4 (MacOS) or 8 (Win), above.

If you installed our Reaper support files before starting Reaper for the first time and find that your Impact controller is not listed in Reaper’s Control Surfaces menu, please follow the steps below.


  1. Open a Finder window.
  2. Open the ‘Go’ menu at the top of your screen.
  3. Select ‘Go to folder’.
  4. Type or copy/paste ‘~/Library/Application Support‘.
  5. Find the ‘REAPER’ folder in that directory and delete it.
  6. Start Reaper and then quit Reaper again.
  7. Run the Reaper support installer you downloaded from your Account page again.


  1. Open a File Explorer window.
  2. Navigate to ‘C:\Users\\AppData\Roaming‘ (note this is normally a hidden directory, follow the instructions on this page to unhide: Show hidden files).
  3. Find the ‘REAPER’ folder in that directory and delete it.
  4. Start Reaper and then quit Reaper again.
  5. Run the Reaper support installer you downloaded from your Account page again.

Patch Changes
If you find that the [< Patch] and [Patch >] buttons don’t work when controlling a third-party plug-in, it’s likely because the plug-in uses it’s own patch browser. The Patch buttons on the Impact series control the patch navigation functions of the DAW, so you may need to save the plug-ins presets in your DAWs patch format, before you can use the Patch buttons on the Impact controller for patch navigation. You can find more information about saving patches in your DAW, in the documentation for that program.

Portable Installation

If you have a portable installation of Reaper, you will need to manually install the control surface files. The files you need can be found on the My Account tab on our website.

Download the file named ‘Reaper_Portable_Installation_Impact’.

Unzip the file and copy/paste the .dll files to the ‘Plugins’ folder within Reaper’s install path (usually C:\Program Files\REAPER (x64)).

If you’re experiencing problems please contact one of our support engineers.

Known Issues

Currently Nektar controllers will operate as generic MIDI devices when running Reaper, as native applications on M1 based Apple computers.

You can run these DAWs in an Intel Mac emulation layer called Rosetta and our support software for those applications will work. Please follow these steps:

  1. Open a Finder window.
  2. Select ‘Applications’ from the list on the left side of the window.
  3. Right-click on the Reaper app and select ‘Get Info…’.
  4. Tick the ‘Open in Rosetta’ option.
  5. Close the Info window.
  6. Start the DAW.