intro
$ sudo pacman -Sy xbindkeys
$ xbindkeys --defaults > ~/.xbindkeysrc

now let’s edit the config file adding some lines about amarok commands.

# amaroK / OPEN
"amarok"
m:0x10 + c:237
Mod2 + NoSymbol

# amaroK / Volume down
"dcop amarok player volumeDown"
m:0x0 + c:174
NoSymbol

this lines are setted up for my keyboard. just need to take the respective button on your keyboard with
$ xbindkeys -k
and copy/paste overwriting mine.
my .xbindkeysrc

finally add a symlink to your ~/.kde/Autostart ( or better, *i* have kde )
$ cd ~/.kde/Autostart && ln -s `which xbindkeys` xbindkeys

that’s all. bb.

amarok, archlinux, xbindkeys