standard tuning, no capo. The whole song is based off of a D-G-A pattern
Run 1
[ Tab from: http://www.guitaretab.com/c/carbon-leaf/381621.html ]
E|-------------------------------------------------------------------------------------------|
B|-----------------2--3--------------------------------------------2--3----------------------|
G|--2--4--5--4--4--------2--0-----------------------2--4--5--4--4--------2--0----------------|
D|-----------------------------4--2--0-----------0-----------------------------4--2p0-----0--|
A|--------------------------------------4--0--4----------------------------------------4-----|
E|-------------------------------------------------------------------------------------------|
Run 2
E|--5p2-----3p2-----0h2-------------2p0-----3p2-----0h2-----------|
B|-------3-------3-------3--2h3--3-------3-------3-------2--3--3--|
G|----------------------------------------------------------------|
D|----------------------------------------------------------------|
A|----------------------------------------------------------------|
E|----------------------------------------------------------------|