Circle of Fifths
Click any key — details appear on the right. Use the 🎹 toggle if you want the keyboard.
Chord Progressions
Full diatonic chart (1–7) for your key — then explore classic progressions.
Pick a degree (1–7)
Tap any number or chart cell to select, hear, and inspect that chord. Gold outline = your pick · teal = in the preset progression below.
Progression
Chord Structures
From basic triads to lush 13ths — tap to hear each shape on the piano.
Degrees 1–7 in this key
Formulas like ♭3 count from the chord root you pick above. Numbers 1–7 are the diatonic chords built on each step of the key.
Nashville Number Practice
Find chord degrees in any key — grid or piano.
BPM Metronome
Big tempo in the center — options on the left, tips on the right.
Tap the circle or press Start
Modal Scales
Dorian, Lydian, Phrygian & more — hear how each mode colors the same root.
Degrees 1–7
Each step of the selected mode on this root.
Time Signatures
Common, compound & odd meters — explanations plus a pattern metronome.
Intervals
Distance between two notes — hear each interval from any root.
Ready?