I am using ALSA for my system sound and I am trying to keep away from PulseAudio and PipeWire things. I do not like them that. I know they provide a way to disable the system sound, just open PavuControl and mute the “System Sounds” channel and done. For ALSA I did not manage to find such a simple way to do it. I also did not find a way to disable it in KDE or Qt configuration files (or I did not search hard enough).