Drop D tuning

----------------------------------------------------------------------------------
------6-------4-------4-------8--6--------4-------4-------11-------4-------4------
----------------------------------------------------------------------------------
----8-------4-------4-------8-----------4-------4-------8--------4-------4--------
--8-------4-------4-------8-------8---4-------4-------8--------4-------4----------
8-------4-------6-------8-----------4-------6-------8--------4-------6------------

-------------------------------------
------8--6-------4-----4-------------
-------------------------------------
----8----------4------4--------------
--8-------8--4------4----------------
8----------4------6------------------