drop-D tuning

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-----------------------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:
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--------------------3----------------------------------------5p3---3--------|
-----3--5------3h5-----------3h5--------3--5------3--4--5--------5-----3h5--|
· 0--------0-------------0----------0---------0---3--4--5------------0------|