Why the Traktor pro 3 have crackling & stuttering issues in windows 11

Have you tried the following;

The Processor scheduling setting lets you choose if your computer should process Programs with higher priority, or Background Services with higher priority. In this context, Programs refer to applications you can see and interact with on your screen. Background Services refer to software that you don't directly interface with but is running in the background and handling essential system tasks. The most important example of a background service in the context of this guide is the driver for your audio interface.

A common reason for dropouts and audio artifacts is the audio interface driver not being able to process all of its data in time. Increasing the processing priority for background services (and with it, the priority of the audio driver) often contributes to improved audio performance. To configure your computer to process background services with higher priority, do the following:

1. Open the Windows Advanced System Settings by clicking on the Start button (Windows icon) and typing 'Advanced System Settings'. Click on the option that appears.
   
   
2. On the Advanced tab under Performance click the Settings... button.
   
   
3. Once again, on the Advanced tab under Performance Options select Background Services.
   
   
4. Note: some applications may work better if the Processor Scheduling parameter remains set to Programs. If your audio performance worsens after following the steps above, revert the setting back to Programs. You may also refer to the documentation of the manufacturer of the software for more information on what setting should be used.