Chord Progressions
Transposing
Roman numerals as a transposition engine · I–IV–V in C → I–IV–V in any key
Why thinking in Roman numerals lets you move a progression to any key instantly — including for singers.
Editorial content for this topic is in progress. The interactive player and pattern data are live below.
Hear the pattern
Interactive player — try the progression in any of the 18 keys, switch modes, and adjust tempo to find the feel you want.
Toggle voice leading in the player to hear it smooth out, or learn voice leading →
FormulaI–IV–V in C → I–IV–V in any key
FunctionSee "About" below for harmonic role.
Soundits logical, rotational clarity
Common inEvery song transposed for a vocalist · Capo-based guitar arrangements · Jazz standards in all 12 keys
FamousEvery song transposed for a vocalist · Capo-based guitar arrangements · Jazz standards in all 12 keys
The circle-of-fifths cyan palette on this page is inspired by music-color synesthesia — transposing maps to circle-of-fifths cyan, reflecting its logical, rotational clarity.
About Transposing
Why thinking in Roman numerals lets you move a progression to any key instantly — including for singers.
Variations
Variation
Another way the pattern shows up in real music.
Famous songs & pieces
- Every song transposed for a vocalist
- Capo-based guitar arrangements
- Jazz standards in all 12 keys
Frequently asked questions
What is a transposing progression?
Why thinking in Roman numerals lets you move a progression to any key instantly — including for singers.
How do I use this on the piano?
Start with the player above in C. Once the pattern is in your ear, transpose to the keys you actually play in. The Roman numerals stay the same; only the chord names change.