This is an awesome idea. I ended up doing it without this tool and just using pulseaudio-ctl. 1. figure out the keycode for key you want to use. for me this wa

This is an awesome idea. I ended up doing it without this tool and just using pulseaudio-ctl. 1. figure out the keycode for key you want to use. for me this was Scroll_Lock, so it looked like: keycode 78 (keysym 0xff14, Scroll_Lock) 2. Add the following to the i3 config: xset -r 78 # no repeat for scroll-lock pulseaudio-ctl mute-input yes # mute at startup bindsym Scroll_Lock exec pulseaudio-ctl mute-input no bindsym --release Scroll_Lock exec pulseaudio-ctl mute-input yes