.xbindkeysrc

# config for MX-Master
# thumb wheel up => increase volume
"xte 'key XF86AudioRaiseVolume'"
   b:6

# thumb wheel down => lower volume
"xte 'key XF86AudioLowerVolume'"
   b:7

# thumb button => play/pause music         
# Credit to gregmuellegger https://bbs.archlinux.org/viewtopic.php?pid=1551271#p1551271                               
# We need a sleep here since the button triggers a few more key codes. 
# It also triggers Control+Mod2+Control_L and Alt+Mod2+Alt_L. The sleep       
# prevents that X receives those keypresses simultaniously. Therefore they    
# might interfere and trigger unwanted actions. By the sleep we make sure that
# the Alt+Left is receive as distinct event.                                  
"sleep 0.1 && xte 'key XF86AudioMute'"                                        
   m:0xc + c:23