I–IV Progression
2 songs from the corpus share this chord-degree set — open one to see and hear the real chords on an interactive fretboard.
What I–IV means
Every song below plays chords built on these scale degrees: I = degree 1, IV = degree 4 — relative to whatever key that song is actually in. The degrees are the same; the real chords are different in every key, which is exactly why the same progression can sound totally different from one song to the next.
Hear it in C major
One real voicing for each degree, in a key real songs in this set are actually written in — tap any diagram to hear it strummed.
2 songs built on I–IV
Closely related progressions
🎭 Character: IV (the subdominant) is what produces a plagal, hymn-like “amen” cadence when it resolves straight to I, skipping V entirely.
🔄 Inversions: An inversion is the same chord with a different note in the bass — first inversion puts the 3rd on the bottom, second inversion the 5th. Try playing any chord above with its 3rd or 5th as the lowest note instead of the root: the chord itself doesn't change, but the bass line moves by step instead of jumping around, which is what makes a progression feel smoother from one chord to the next.
Learn the theory
Hear any progression instantly
Build a progression in any key and hear it played back on a live fretboard, or drop in a track and see which one it's actually using.
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