This song is in drop D tuning. In drop D tuning the low E string is
tuned down one whole step to D. To tune your guitar to drop D tuning,
first make sure your tuned to standard tuning. Then you'll want to tune
your low E string down two steps to D (we drop it down one step, hence
the name). See the picture below. You can use the audio clip below to
tune your low E string to D for drop D tuning.
Intro Riff
Here's what both guitar parts sound like together:
