45: How do I turn down the bell volume in Emacs running under X Windows? You can adjust the bell volume and duration for all programs with the shell command xset. Invoking xset without any arguments produces some basic information, including the following: usage: xset [-display host:dpy] option ... To turn bell off: -b b off b 0 To set bell volume, pitch and duration: b [vol [pitch [dur]]] b on