I am responsible for the PCs of a small internet cafe run by an NGO. For practical reasons we have chosen Debian as the operating system. We have set it up basically in the basic settings like usual PCs (no money for any special things). People are able to connect their own headphones, some of them tend to put the volume up just too high, even after asking them not to do so. Is there a way to set the volume to a maximum (f.e. in alsa)?