Knowing which chords work well together, and which chords occur in each key,
is fundamental to writing songs and chord sequences.
If you want to write a chord sequence to accompany a melody or an improvisation
then you need to know which chords will fit together in a coherent way.

"Song Analysis" is under development

Chords in a Major Key

Major Key Chord Progressions

Chords in a Minor Key

Minor Key Chord Progressions

Song Turnarounds

Song Analysis