drop-D tuning

Here's the main riff, of the song:
----------------------------------------------------------------------------|
----------------------------------------------------------------------------|
----------------------------------------------------------------------------|
-----------------------3----------------------------------------------------|
--------3--5------3h5---------3h5--------3--5-----3--4--5-------------------|
----0--------0------------0----------0------------3--4--5---0---------------|

part of the way through the song,
Travis adds a little trill to the end of the riff:
----------------------------------------------------------------------------|
----------------------------------------------------------------------------|
----------------------------------------------------------------------------|
--------------------3----------------------------------------5p3---3--------|
-----3--5------3h5-----------3h5--------3--5------3--4--5--------5-----3h5--|
· 0--------0-------------0----------0---------0---3--4--5------------0------|