Why do I hear a rhythmic click in my headset?

I like to play session on the PC and you need a controller. I have the Razer Raiju (Ps4 variant) and can only hear sound via the Aux connector of the controller. However, I always hear an unpleasant click that always beats at the same distance. Why is this happening and what can I do about it? If I only use the keyboard and mouse, everything works perfectly and I never have any problems with the Ps4.

Yes you say it yourself your headphone jack on the controller, you can hardly fix it without modifying the whole controller.