Mute toggle script.

i3/config.m4

@@ -72,6 +72,8 @@ bindsym Shift+XF86MonBrightnessDown exec light -U 1
 bindsym Shift+XF86MonBrightnessUp exec light -A 1
 ])
 
+bindsym Print exec ~/etc/toggle_mute.sh
+
 # resize window (you can also use the mouse for that)
 mode "resize" {
         # These bindings trigger as soon as you enter the resize mode

toggle_mute.sh

@@ -0,0 +1,15 @@
+#!/bin/sh
+
+if pacmd dump | grep -v monitor | grep -q '^set-source-mute .* no$'; then
+  mute=yes
+else
+  mute=no
+fi
+
+pacmd dump | sed "/monitor/d;/^set-source-mute /!d;s/ \(no\|yes\)$/ $mute/" | pacmd
+
+if [ "$mute" = "yes" ]; then
+  notify-send -u normal -t 1000 muted
+else
+  notify-send -u critical -t 1000 UNMUTED
+fi