Super Simple Chords

Chord progression

The I–II7–V7–I chord progression

C – D7 – G7 – C in C. 34 songs in the library go round it. Hear it in any style and key, and see it in all twelve keys.

Tuning the piano…
Style
Key

Want to mix it with other hands?

The loop

4 chords, round and round, in C. Each chord on the keys:

CID7II7G7V7CI

In every key

Find your song's key on the left: its chords are the row. Each column keeps its colour, whatever the key.

KeyIII7V7I
CCD7G7C
DbDbEb7Ab7Db
DDE7A7D
EbEbF7Bb7Eb
EEF#7B7E
FFG7C7F
F#F#G#7C#7F#
GGA7D7G
AbAbBb7Eb7Ab
AAB7E7A
BbBbC7F7Bb
BBC#7F#7B

Songs that go round it

34 songs, best known first. Rest the mouse on one to hear it.

All of them

Left hands these songs use

The patterns most often played under this loop.

Questions about I–II7–V7–I

What is the I–II7–V7–I chord progression?

A loop of 4 chords: C – D7 – G7 – C in C. The numerals say each chord's place in the key, so the same loop can be played in any key.

What songs use the I–II7–V7–I progression?

34 songs in the library repeat it, including All I Want For Christmas Is My Two Front Teeth, Easy Street, Soon And Very Soon, Mona Lisa and Faith Of Our Fathers.

How do I play I–II7–V7–I on piano?

Hold each chord with the right hand while the left hand plays its root, then swap in a pattern: power fifths is the left hand these songs use most. The player above plays it in any style and key.