CifraLab

Orbital transposer

Turn the circle of fifths and watch a progression change key without changing its function.

CIVGIDVAEBF#DbAbEbBbFAmiiEmviBmiiiF#mC#mG#mD#mBbmFmCmGmDmC→ G
Major chords / Relative minorsTap a key on the wheel: the wedge of degrees turns with it.

Original

C

Target

G

From C to G is 7 semitones up.

Capo suggestion

To play in G with open C shapes, put the capo on fret 7.

What transposing means

Transposing moves a progression to another key while keeping the relationship between its chords. The degrees (I, IV, V, vi...) stay the same; only the chord names change. On the circle of fifths this looks like a rotation: the whole six-chord wedge of the key moves together. That is why a singer can ask for the same song lower or higher and the guitarist only has to turn the wheel or use a capo.

How to transpose a song, step by step

Transposing means moving every chord of a song up or down by the same distance, so the song sounds higher or lower but keeps exactly the same shape. That distance is measured in semitones: one semitone is one fret on the guitar or the next key, white or black, on the piano.

The 12-semitone ladder

  1. 0C
  2. 1C#Db
  3. 2D
  4. 3D#Eb
  5. 4E
  6. 5F
  7. 6F#Gb
  8. 7G
  9. 8G#Ab
  10. 9A
  11. 10A#Bb
  12. 11B

Every note is one step on this ladder. After B the ladder starts again at C. Sharp (#) and flat (b) are two names for the same step: C# and Db are the same sound.

The method in four steps

  1. Find the original key and the new key. Usually the key is the first or last chord of the song.
  2. Count the semitones between them on the ladder. From C to D there are 2 steps (C → C# → D), so the distance is +2.
  3. Move the root of every chord by that same number of steps: C becomes D, G becomes A, F becomes G.
  4. Keep the chord type exactly as it was. If it was minor, it stays minor (Am becomes Bm); if it had a 7, it keeps the 7 (E7 becomes F#7).

Example: from C to D (+2 semitones)

ICD
VGA
viAmBm
IVFG
V7G7A7

Why does C go to D, and D to E?

Because the whole song moves up the same distance. If the singer needs the melody one tone higher, every chord must rise one tone as well; otherwise the chords would no longer match the melody. The relationship between the chords does not change: the first chord is still the home chord (I), the second is still the vi, and so on. Only the names change.

Tricks to remember it

  • E–F and B–C have no black key between them on the piano: from E to F is one semitone, not two. They are the only two places where the ladder “skips” the sharp.
  • Count on your fingers: say the ladder out loud (C, C#, D, D#, E, F…) and bend one finger per step. Two fingers from C lands on D.
  • Think in degrees, not names: learn the song as I–V–vi–IV and you can play it in any key by looking up those degrees in the orbital wheel.
  • The capo transposes for you: each fret raises everything one semitone. G shapes with a capo on fret 2 sound in A.
  • Moving one step around the circle of fifths (C → G → D…) changes only one note of the scale, so neighbouring keys feel familiar and are the easiest to switch between.

How to use it

How to use the Orbital Transposer

The Orbital Transposer turns the circle of fifths into a visible and audible practice tool. Keep a progression intact, move it to another key, hear both versions, and calculate a capo position that preserves familiar open guitar shapes.

  1. What transposition means

    Transposing moves a progression to another key while keeping the relationship between its chords. The degrees (I, IV, V, vi...) stay the same; only the chord names change.

    On the circle of fifths this looks like a rotation: the whole six-chord wedge of the key moves together. That is why a singer can ask for the same song lower or higher and the guitarist only has to turn the wheel or use a capo.

    Transposition does not change chord function. The tonic remains I, the subdominant IV, and the dominant V; only the absolute pitch moves.

    This lets you adapt a song to a singer without losing its harmonic character or learning an entirely new progression.

  2. How to read the wheel

    The outer ring shows major keys and the inner ring their relative minors. When you choose a target, the degree wedge turns as one unit: every box keeps its Roman numeral and receives the chord belonging to the new key.

    Tap a key on the wheel: the wedge of degrees turns with it.

    Start with I–V–vi–IV and compare C–G–Am–F with G–D–Em–C. Then try a minor progression and notice which common tones remain between neighboring chords.

  3. When to use a capo

    A capo helps when the new key fits a singer better but you want to keep familiar fingering. The transposer shows the fret where open shapes will produce the selected target key.

    Check that the suggested fret suits your tuning and the melody register. If the result feels too tense or too high, choose another key and compare again.

  4. A five-minute routine

    • Play the original progression slowly.
    • Choose a new key and name the Roman numerals as the wedge moves.
    • Listen to the transposed version and sing the tonic before returning to chord one.
    • Try the suggested capo with a simple strum.
    • Repeat in a neighboring key until you can anticipate every chord.

  5. Common mistakes

    Do not confuse transposition with rearranging the chords. Chord symbols such as C, Am, and G7 are international musical notation.

    Move every function together and use your ear to confirm the result.

    Original and target are the same key: choose another one on the wheel.

    When the source and target keys match, there is no transposition to practise. Pick another position and use the audio comparison to check that the relationship between degrees remains stable.