The tuning is standard tuning.
The main riff has a very cool feel that is created by the first note in the riff appearing on the upbeat. This gives it sort of a floating and unpredictable feel.
The verse has a very odd timing to it that I will explain how to follow in detail. The chords themselves are very simple to play once you understand the timing of them.
For Jimmy Page's solo, I will demonstrate how to play the main harmony guitar part sort of like he would play it live instead of showing every single harmony line in detail.
I hope this lesson helps you get this fun song off of Led Zeppelin IV down quickly!
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