Realtek Audio Control Panel Site
At the top: . I was set to “Stereo.” Fine. But then I saw it. A tiny, almost apologetic checkbox: “Separate all input jacks as independent input devices.”
The sound that came out of my speakers was not loud. It was present . It felt less like audio and more like geometry—a perfect circle of pressure that existed only in the space between my ears. My cat, who had been asleep on the subwoofer, woke up, looked at me with an expression of profound betrayal, and left the room. She has not returned. realtek audio control panel
Sound returned. The crackle was gone. The speakers worked perfectly. In fact, everything sounded better than it ever had—clear, warm, detailed. The Realtek Audio Control Panel had reset itself to factory defaults, but it had also, somewhere in the process, fixed the underlying hardware glitch that had started all of this. At the top:

