Construction
| Note | Interval | Degree |
|---|---|---|
| A | Root | 1 |
| C | Minor 3rd | ♭3 |
| E | Perfect 5th | 5 |
| G | Minor 7th | ♭7 |
Fingering
| Note | Key color | Right hand | Left hand |
|---|---|---|---|
| A | white | thumb (1) | little finger (5) |
| C | white | index finger (2) | middle finger (3) |
| E | white | middle finger (3) | index finger (2) |
| G | white | little finger (5) | thumb (1) |
Right hand: thumb (1) on A, index finger (2) on C, middle finger (3) on E, little finger (5) on G.
Left hand: little finger (5) on A, middle finger (3) on C, index finger (2) on E, thumb (1) on G.
A Minor 7th Inversions
- Root positionA – C – E – G
- 1st inversion (Am7/C)C – E – G – A
- 2nd inversion (Am7/E)E – G – A – C
- 3rd inversion (Am7/G)G – A – C – E
Key Signature
A chord has no key signature of its own, but the A Minor 7th is the tonic (i) chord of A Minor, which shares the signature of its relative major, C Major: no sharps or flats.
Chords in the Key of A Minor
These are the triads built on each degree of A Minor:
How A Minor 7th functions in a key
The same chord takes on a different harmonic role depending on the key it appears in. Here is where A Minor 7th sits diatonically across the common keys:
- In C major, A Minor 7th is the vi chord — the tonic.
- In A minor, A Minor 7th is the i chord — the tonic.
- In G major, A Minor 7th is the ii chord — a predominant.
- In E minor, A Minor 7th is the iv chord — a predominant.
- In F major, A Minor 7th is the iii chord — a mediant / color chord.
- In D minor, A Minor 7th is the v chord.
Scales That Include the A Minor 7th
Same Notes, Other Names
The notes A – C – E – G aren’t exclusive to this chord. Depending on which note is the bass and how the chord functions, the same pitches also spell:
Looking for Am(maj7)? See the A minor major 7th piano chord.
A Minor 7th : Frequently Asked Questions
What is the A Minor 7th chord on piano?
What notes are in the A Minor 7th chord?
How does A Minor 7th differ from A Dominant 7th?
How is A Minor 7th used in music?
What genres commonly use Minor 7th chords?
What songs use Minor 7th chords?
What is the ii–V–I progression?
A Minor 7th in detail
Exact
Every pitch class is present and nothing outside the chord is added.
| Type | Notes | Semitones | Span | Omissions and additions | Set relation | Fit |
|---|---|---|---|---|---|---|
| Close, root position | A3 C4 E4 G4 | 10 | 138 mm | none | identical | |
| Close, first inversion | C4 E4 G4 A4 | 9 | 124 mm | none | identical | |
| Close, second inversion | E4 G4 A4 C5 | 8 | 110 mm | none | identical | |
| Close, third inversion | G4 A4 C5 E5 | 9 | 124 mm | none | identical | |
| Drop 2 | E3 A3 C4 G4 | 15 | 206 mm | none | identical | |
| Drop 3 | C3 A3 E4 G4 | 19 | 261 mm | none | identical | |
| Drop 2 and 4 | A2 E3 C4 G4 | 22 | 303 mm | none | identical |
Reduced
A subset of the pitch classes: the identity is incomplete rather than altered.
| Type | Notes | Semitones | Span | Omissions and additions | Set relation | Fit |
|---|---|---|---|---|---|---|
| Shell, root ♭7 ♭3 | A2 G3 C4 | 15 | 206 mm | omits E | subset | |
| Guide tones, ♭3 and ♭7 | C4 G4 | 7 | 96 mm | omits A and E | subset | |
| Rootless close | C4 E4 G4 | 7 | 96 mm | omits A | subset |
Spans are measured centre to centre at a 165 mm octave (standard keyboard geometry).
| Position | Bass note | Notes in order | Figured bass | Semitones | Span |
|---|---|---|---|---|---|
| Root position | A | A3, C4, E4, G4 | 7 | 10 | 138 mm |
| First inversion: Am7/C | C | C4, E4, G4, A4 | 6/5 | 9 | 124 mm |
| Second inversion: Am7/E | E | E4, G4, A4, C5 | 4/3 | 8 | 110 mm |
| Third inversion: Am7/G | G | G4, A4, C5, E5 | 4/2 | 9 | 124 mm |
One position per chord tone in the bass. Spans are for close position: voiced inversions appear under Voicings.
| Progression | Key | Role | Sequence | Voice leading |
|---|---|---|---|---|
| vi, IV, I, V | C major | vim7 | Am7 to Fmaj7 to Cmaj7 to G7 | Am7 opens the phrase |
| I, vi | C major | vim7 | Cmaj7 to Am7 | 3 tones held from Cmaj7 |
| v, i | D minor | vm7 | Am7 to Dm7 | Am7 opens the phrase |
| ii, v, i | D minor | vm7 | Em7♭5 to Am7 to Dm7 | 2 tones held from Em7♭5 |
| iv, v, i | E minor | ivm7 | Am7 to Bm7 to Em7 | Am7 opens the phrase |
| i, iv | E minor | ivm7 | Em7 to Am7 | 2 tones held from Em7 |
| iii, vi, ii, V | F major | iiim7 | Am7 to Dm7 to Gm7 to C7 | Am7 opens the phrase |
| I, iii | F major | iiim7 | Fmaj7 to Am7 | 3 tones held from Fmaj7 |
Root motion, common tones and voice displacement are computed from pitch class sets. Roman numerals follow common practice functional harmony.
Which keys it belongs to
| Key | Roman numeral | Function |
|---|---|---|
| C major | vim7 | Tonic substitute |
| D minor | vm7 | Minor dominant |
| E minor | ivm7 | Subdominant |
| F major | iiim7 | Tonic substitute |
| G major | iim7 | Predominant |
| A minor | im7 | Tonic, home |
Classification system: common-practice functional harmony.
Change one note
Chords a single note away, and what moving that note does.
| Chord | Change | Formula | Common tones |
|---|---|---|---|
| Am9 | adds B | 1 ♭3 5 ♭7 9 | 4 |
| Am | drops G | 1 ♭3 5 | 3 |
| A7 | C becomes C♯ | 1 3 5 ♭7 | 3 |
| AmMaj7 | G becomes G♯ | 1 ♭3 5 7 | 3 |
| Am7♭5 | E becomes E♭ | 1 ♭3 ♭5 ♭7 | 3 |
| A7sus4 | C becomes D | 1 4 5 ♭7 | 3 |
| Am6 | G becomes F♯ | 1 ♭3 5 6 | 3 |
| A9 | C becomes C♯, B | 1 3 5 ♭7 9 | 3 |
| A | C, G becomes C♯ | 1 3 5 | 2 |
| Adim | E, G becomes E♭ | 1 ♭3 ♭5 | 2 |
| Asus2 | C, G becomes B | 1 2 5 | 2 |
| Asus4 | C, G becomes D | 1 4 5 | 2 |
Frequencies
| Note | MIDI | Frequency |
|---|---|---|
| A3 | 57 | 220.00 Hz |
| C4 | 60 | 261.63 Hz |
| E4 | 64 | 329.63 Hz |
| G4 | 67 | 392.00 Hz |
Reference pitch A440, 12-TET, close root position.
Set theory: prime form, Forte number, interval vector
- Absolute pitch class set
- {9, 0, 4, 7}
- Normal order
- [4, 7, 9, 0]
- Prime form
- (0358)
- Forte number
- 4-26
- Interval vector
- <012120>
| Pair | Interval | Semitones | Interval class |
|---|---|---|---|
| A to C | Minor third | 3 | 3 |
| A to E | Perfect fifth | 7 | 5 |
| A to G | Minor seventh | 10 | 2 |
| C to E | Major third | 4 | 4 |
| C to G | Perfect fifth | 7 | 5 |
| E to G | Minor third | 3 | 3 |
Where these facts come from
Every value on this page is derived from the note formula for a minor 7th applied to the root A, using standard music theory. Nothing here is hand-entered per chord, so the notes, intervals, inversions and frequencies cannot drift out of agreement with each other. Pitches assume 12-TET at A440.