# thumb wheel up => increase volume and unmute      
"amixer -D pulse set Master 1000+ unmute ; pkill -RTMIN+10 i3blocks"
   b:6                                   
                                        
# thumb wheel down => lower volume       
"amixer -D pulse set Master 1000- ; pkill -RTMIN+10 i3blocks"       
   b:7                                   
                                        
# backward button => previous song       
"xte 'key XF86AudioPrev'"                
   b:8                                   
                                        
# forward button => next song            
"xte 'key XF86AudioNext'"                
   b:9
