Jazz · Advanced · major key
Diminished passing chord (I–#i°7–ii–V)
I – ♯i°7 – ii – V — A diminished chord fills the gap between I and ii — old-time, swinging and smooth.
Chord shapes in G major (standard tuning)
Using a different tuning? Open it in the Looper — it finds playable shapes for whatever tuning you choose.
How the chords work
Written in Roman numerals, this progression is I – ♯i°7 – ii – V — in C major that is C – C#dim7 – Dm – G. Each numeral is a step of the scale; upper case is a major chord, lower case minor.
- I — the home chord — the progression feels finished when it lands here.
- ii — a soft minor chord that leads towards V (a "pre-dominant").
- V — the tension chord that wants to resolve home.
Diminished passing chord (I–#i°7–ii–V) in all 12 keys
| Key | Chords | Hear / play |
|---|---|---|
| C major | CC#dim7DmG | Looper |
| G major | GG#dim7AmD | Looper |
| D major | DD#dim7EmA | Looper |
| A major | AA#dim7BmE | Looper |
| E major | EFdim7F#mB | Looper |
| B major | BCdim7C#mF# | Looper |
| F# major | F#Gdim7G#mC# | Looper |
| Db major | DbDdim7EbmAb | Looper |
| Ab major | AbAdim7BbmEb | Looper |
| Eb major | EbEdim7FmBb | Looper |
| Bb major | BbBdim7CmF | Looper |
| F major | FF#dim7GmC | Looper |
Practice ideas
- Beginners: play one strum per chord and say the chord names out loud, then two strums, then a steady down-down-up-up-down-up pattern.
- Change keys with a capo: keep the G major shapes and move a capo up — the capo calculator shows which fret gives the key you want.
- Solo over it: loop it in the Looper and improvise with the G major pentatonic or G major scale — the scale pages show every position and play a backing track.
- Train your ear: the progression ear trainer mixes this with similar progressions until you can tell them apart.
Similar progressions
- Bird blues (Parker changes) Imaj7 – viiø7 – III7 – vi7 – II7 – v7 – I7 – IV7 – iv7 – ♭VII7 – iii7 – VI7 – ii7 – ♭III7 – ii7 – V7
- Jazz blues I7 – IV7 – I7 – I7 – IV7 – ♯iv°7 – I7 – VI7 – ii7 – V7 – I7 – V7
- "Fly Me to the Moon" cycle vi7 – ii7 – V7 – Imaj7 – IVmaj7 – viiø7 – III7 – vi7
- Rhythm changes A section Imaj7 – vi7 – ii7 – V7 – iii7 – VI7 – ii7 – V7
- ii–V–I–VI turnaround ii7 – V7 – Imaj7 – VI7
- Jazz circle iii–vi–ii–V–I iii7 – vi7 – ii7 – V7 – Imaj7
← I–I+–vi–IV (augmented passing) · I6–vi7 swing vamp →
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Questions
What chords are in the I – ♯i°7 – ii – V progression?
In G major: G – G#dim7 – Am – D. In C major / A minor: C – C#dim7 – Dm – G. The table on this page lists all 12 keys.
What is the best key to play I – ♯i°7 – ii – V on guitar?
G major uses the most open-position chord shapes in standard tuning. Use a capo with those shapes to reach other keys.