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.

C
D
E
F
G
A
B
C
D
E
F
G
A
B
I›C
100 BPM
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.

C
D
E
F
G
A
B
C
D
E
F
G
A
B
I›C
90 BPM

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.

Related topics

notation
Roman Numerals
The universal language of progressions
foundations
Foundations
Functions, tension, and the phrase model
modal
Modal Progressions
Progressions that confirm a mode