Sound card activation

i switched from windows to debian 12 and i have no more sound on my computer
how can i fix it svp

Hi - typically, the function of basic hardware devices like sound cards will rely on the underlying operating system - things like the Linux kernel itself, and any additional modules/drivers that are distributed along with it.

KDE software generally sits on top of that, providing a graphical desktop environment and applications, but problems with basic hardware function would likely be best served by asking others who are using your same Linux distribution. For Debian, those resources would be located here: Debian -- User Support

Hope that helps,