Drop A tuning: (A-E-A-D-G-B)
[ Tab from: https://www.guitartabs.cc/tabs/t/taproot/smile_tab_ver_3.html ]
Intro / Main Riff
B|--------------------------------------------------------------------------|
G|--------------------------------------------------------------------------|
D|--------------------------------------------------------------------------|
A|---44-4-4--44-4-4--44-4-4-----4-3-0-2-------------------------------------|
E|---44-4-4--44-4-4--44-4-4-----4-3-0-2-------------------------------------|
A|---44-4-4--44-4-4--44-4-4-----4-3-0-2-------------------------------------|