Major tonic
The strongest home chord.
Start from the diatonic chords of a major key, then hear how tonic, predominant and dominant functions create reusable progressions in every key.
A major key gives you a predictable family of diatonic chords. Roman numerals let the same progression move to any key.
The strongest home chord.
Often prepares V.
Useful for smoother bass motion and substitutions.
Moves naturally toward V or back to I.
Creates the strongest pull toward I.
Common tonic-family alternative.
Creates tension toward I.
The chord names change with the key, but the Roman-numeral relationships remain the same.
Clear tonic–predominant–dominant motion.
A widely used four-chord cycle.
Tonic to relative minor, then predominant and dominant.
A strong functional path toward tonic.
Think in degrees first, then map each degree to chord names in the target key.
I–IV–V in C.
The same function in G.
The same function in D.
Use these answers as a reference, then explore the relationships interactively.
It is a sequence of chords drawn from or centered on a major key, often described with Roman numerals so the same functional pattern can be transposed.
I–IV–V, I–V–vi–IV, I–vi–IV–V and I–vi–ii–V are useful starting points.
Roman numerals describe chord function independently of key, making transposition and harmonic comparison easier.
Change the key, compare voicings, follow voice leading and see the same idea directly on the fretboard.