Progression Builder
Build chord progressions with real-time Roman numeral analysis. Tap any chord to preview it, tap again to add it.
Key
Scale
Current C Major
Formula
Add chords to see the formula
Timeline
Your progression will appear here
Diatonic C Major
CDEFGAB
Circle of Fifths
Click a key to show its chords and neighbors
Feedback
Pick a chord from the grid to start building your progression in C Major.
Tap once to preview & hear, tap again to add.
Chord Palette filtered · 3 roots
Major
Minor
Dominant
Dim · Aug
Level
C
C I selected
Diatonic root Major
Minor
Dominant
Dim · Aug
F
F IV neighbor
Diatonic root Major
Minor
Dominant
Dim · Aug
G
G V neighbor
Diatonic root Major
Minor
Dominant
Dim · Aug
Common Progressions