I Hear No Sound When Playing the Keys of my Komplete Kontrol S-Series Keyboard

Symptom

You cannot hear any sound when playing the keys of your Komplete Kontrol S-Series keyboard and it is not available as a MIDI device in the Komplete Kontrol Preferences.

Cause

This issue can be caused by the following:

1. The services NIHardwareAgent and/or NIHostIntegrationAgent are not running.
2. The MIDI input ports of the keyboard are turned off.
3. The keyboard is not correctly connected.
4. Mac only: A plug-in in the HAL folder prevents the keyboard from being recognized.
5. Windows only: The keyboard driver is not correctly installed.

Solution

Follow these steps to solve the issue:

1. Make sure that the services NIHardwareAgent and NIHostIntegrationAgent are running on your computer. Follow these steps for Mac or Windows:
   

   Mac

   • Open your Mac's System Preferences and choose Users & Groups > Login Items.
     
   • If the files NIHardwareAgent and/or NIHostIntegrationAgent are missing from the list, add them by clicking the '+' icon and navigating to the following location:
     Mac HD > Library > Application Support > Native Instruments > Hardware
   • Select the missing service and click Add:
     
     

     Note: You can choose both entries by holding the SHIFT key on your computer keyboard and clicking both entries.

   Windows

   • Open the Windows Task Manager and choose the Services tab.

     Note: If the Services tab is not directly available, expand the view by clicking 'More details' in the lower left corner of the window.

   • Search the list and check if the Status of the services NIHostIntegrationAgent and NIHardwareService is Running:
     
   • If not, right click the respective entry and choose Start from the context menu:
     
2. Activate the MIDI input ports of the keyboard:
   
   • Open the Komplete Kontrol Preferences and choose Input in the MIDI tab.
   • Mac: Make sure the inputs are activated. If the inputs are not checked, click the square next to the respective entry to activate the input:
     
   • Windows: Make sure the inputs are activated. If the inputs are not checked, click the square next to the respective entry to activate the input:
     
3. If still available, make sure to use the original USB cable that came with the keyboard. Connect the cable directly to the computer. If you have to use a USB hub, make sure to choose a powered hub.
4. Mac only: To find out if a plug-in in the HAL folder prevents the keyboard from being recognized, follow the instructions in this article.
5. Windows only: To make sure that the keyboard driver is correctly installed, follow the instructions in chapter 2 and 3 in this article.