Dm7 · ii
D · F · A · C
Minor seventh built on scale degree 2.
Jazz starter
Start playing jazz
Jazz has a language: swing time, seventh-chord colors, ii–V–I movement, inversions, comping, and lead sheets. Learn the theory just far enough to hear it and use it at the keyboard.
The map
Six ideas, one first song
Start with a swung pulse. Build a ii–V–I from a key. Voice the chords with small moves. Then use a simple comping rhythm underneath a melody from a lead sheet. That is enough theory to begin making real jazz.
First 20 minutes
- 4 min: clap or tap a swung eighth-note pulse.
- 6 min: build Dm7 → G7 → Cmaj7 from C major.
- 6 min: use the small right-hand voicings below.
- 4 min: comp the off-beat rhythm without stopping.
Theory 1 · feel
Swing changes the shape of the beat
Straight eighth notes divide a beat evenly: 1 & 2 & 3 & 4 &. In a basic swing feel, each pair leans long–short instead. A useful mental model is a triplet: play the first and third parts of the triplet, not the middle one. Do not make it mathematically rigid—listen, tap your foot, and let the second note arrive later than it would in pop music.
Straight: even · Swing: long–short
- Set a metronome to 60 bpm and tap quarter notes with your left hand.
- Play C–D–E–F–G–A–B–C in your right hand with a long–short feel.
- Keep the beat steady even when the swing feel is not yet natural.
Theory 2 · harmony
ii–V–I comes from the scale
Roman numerals name scale degrees. In C major, the second, fifth, and first degrees are D, G, and C. Stack every other note from that scale to make seventh chords: Dm7 → G7 → Cmaj7. This is the essential jazz resolution: preparation → tension → home.
| Scale degree | Root in C major | Seventh chord | Notes | Job |
|---|---|---|---|---|
| ii | D | Dm7 | D · F · A · C | Sets up motion |
| V | G | G7 | G · B · D · F | Creates tension |
| I | C | Cmaj7 | C · E · G · B | Resolves home |
Theory 3 · chord symbols
Read the small marks after the root
A chord symbol tells you the root and chord quality. In lead sheets, this shorthand is the harmony map. Learn these four first; they appear constantly in jazz and explain why ii–V–I has three different colors.
| Symbol | Formula from root | C example | What to hear |
|---|---|---|---|
| maj7 | 1 · 3 · 5 · 7 | C · E · G · B | Warm, settled color |
| m7 | 1 · ♭3 · 5 · ♭7 | C · E♭ · G · B♭ | Soft, open minor color |
| 7 | 1 · 3 · 5 · ♭7 | C · E · G · B♭ | Unsettled; wants to move |
| dim7 | 1 · ♭3 · ♭5 · ♭♭7 | C · E♭ · G♭ · A | Symmetrical passing tension |
♭ means “one semitone lower.”
Put theory on keys
The ii–V–I in C
Yellow marks the root. Mint marks the other notes in the chord. First say the Roman numeral, then the chord name, then play the shape.
G7 · V
G · B · D · F
Dominant seventh built on scale degree 5.
Cmaj7 · I
C · E · G · B
Major seventh built on scale degree 1.
Theory 4 · inversions
Keep nearby notes nearby
An inversion uses the same chord notes in a different order. Jazz pianists use inversions to avoid leaping around the keyboard. The goal is voice leading: choose the next voicing with the smallest possible moves.
Dm7 shell · ii
Left: D · Right: F + C
Third + seventh define the chord color.
G7 shell · V
Left: G · Right: B + F
F stays; C resolves down to B.
Cmaj7 shell · I
Left: C · Right: E + B
Keep B, then let F resolve down to E.
Theory 5 · comping
Jazz chords often answer off the beat
Comping means accompanying a melody with chord rhythm. Instead of landing every chord on beat 1, jazz often places chords on an off-beat (the “and”). Space is part of the rhythm: you do not need to fill every beat to sound active.
One-bar starter rhythm
Count: 1 & 2 & 3 & 4 &
Hold the first chord for the bar, then play the next chord on the “and” after 3. Loop Dm7 → G7 → Cmaj7 with a swung feel.
Theory 6 · lead sheets
A lead sheet is a song map, not a full arrangement
A lead sheet normally gives you a melody and chord symbols where the harmony changes. You do not need to become a sight-reader first: begin by speaking the chord symbols, playing their roots, and learning a short melody phrase by ear or from an authorized lead sheet. Then let your left hand comp while your right hand plays the melody.
- Find the key and circle every ii–V–I you recognize.
- Play the chord roots in time while counting the form aloud.
- Add shell voicings, using the nearest inversion.
- Add one melody phrase only after the harmony keeps moving.
Apply it to a standard
Use the concepts, not a copied arrangement
A first jazz standard such as Satin Doll contains multiple ii–V movements and syncopated melody pushes. Use an authorized lead sheet or a legal tutorial for the actual music; this page gives you the transferable theory: identify the ii–V, preserve close voicings, and let the melody land around the pulse rather than only on strong beats.
Next step
Move the same theory to F
Build Gm7 → C7 → Fmaj7 from F major. If you can explain why those are ii, V, and I, play them with small voice-led moves, and comp them in a swing pulse, you are learning jazz—not just memorizing three shapes. Use the chord explorer and progressions page as references.