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RootSelectedPlaying

Select a note to explore its harmony. Shift + Enter or middle-click sets a preferred root.

Chord interpretation

Preferred rootKeyEnsemble bassKey modeNote spelling

Preceding chordOptional chord symbol, including slash chords.Following chordOptional chord symbol, including slash chords.

Surrounding chords favour possible ii–V motion and dominant resolutions. These are ranking hints, not certainty; every note-supported alternative remains available. Clear these fields to compare without neighbouring harmony.

Include rootless interpretations

Ensemble bass describes another musician’s bass note for analysis. Playback uses your selected notes. A preferred root helps rank interpretations; it can be absent from your voicing.

Shape-family explorer

Explore the same tone collection, reduce it to a root–third–seventh shell, or restore omitted tones and add a ninth. Shells simplify the colour; fuller versions may change the chord symbol.

InterpretationStarting string (thickest = 1)Bass degree

Current tuning · frets 0–15 · contiguous strings · one voice per tone · up to four adjacent frets. Shape suggestions, not prescribed fingerings.

Inversions and string sets · 12 shapes

Tones: C (1), E (3), G (5), B (7).

B in bass (7) · strings 2–5

Frets, thickest to thinnest: × · 2 · 2 · 0 · 1 · ×

C in bass (1) · strings 2–5

Frets, thickest to thinnest: × · 3 · 2 · 0 · 0 · ×

G in bass (5) · strings 1–4

Frets, thickest to thinnest: 3 · 3 · 2 · 4 · × · ×

E in bass (3) · strings 3–6

Frets, thickest to thinnest: × · × · 2 · 4 · 1 · 3

E in bass (3) · strings 1–4

Frets, thickest to thinnest: 0 · 2 · 5 · 5 · × · ×

G in bass (5) · strings 3–6

Frets, thickest to thinnest: × · × · 5 · 5 · 0 · 0

B in bass (7) · strings 1–4

Frets, thickest to thinnest: 7 · 7 · 5 · 5 · × · ×

E in bass (3) · strings 2–5

Frets, thickest to thinnest: × · 7 · 5 · 5 · 0 · ×

C in bass (1) · strings 1–4

Frets, thickest to thinnest: 8 · 7 · 9 · 0 · × · ×

B in bass (7) · strings 3–6

Frets, thickest to thinnest: × · × · 9 · 9 · 8 · 8

G in bass (5) · strings 2–5

Frets, thickest to thinnest: × · 10 · 10 · 9 · 0 · ×

C in bass (1) · strings 3–6

Frets, thickest to thinnest: × · × · 10 · 9 · 8 · 7

Shell voicings · 9 shapes

Tones: C (1), E (3), B (7).

Removed: G (5).

C in bass (1) · strings 2–4

Frets, thickest to thinnest: × · 3 · 2 · 4 · × · ×

E in bass (3) · strings 3–5

Frets, thickest to thinnest: × · × · 2 · 4 · 1 · ×

B in bass (7) · strings 4–6

Frets, thickest to thinnest: × · × · × · 4 · 1 · 0

B in bass (7) · strings 2–4

Frets, thickest to thinnest: × · 2 · 2 · 5 · × · ×

C in bass (1) · strings 4–6

Frets, thickest to thinnest: × · × · × · 5 · 5 · 7

C in bass (1) · strings 1–3

Frets, thickest to thinnest: 8 · 7 · 9 · × · × · ×

B in bass (7) · strings 1–3

Frets, thickest to thinnest: 7 · 7 · 10 · × · × · ×

B in bass (7) · strings 3–5

Frets, thickest to thinnest: × · × · 10 · 9 · 0 · ×

C in bass (1) · strings 3–5

Frets, thickest to thinnest: × · × · 10 · 9 · 12 · ×

Fuller versions · 10 shapes

Tones: C (1), E (3), G (5), B (7), D (9).

Added: D (9).

E in bass (3) · strings 1–5

Frets, thickest to thinnest: 0 · 2 · 0 · 0 · 1 · ×

B in bass (7) · strings 2–6

Frets, thickest to thinnest: × · 2 · 0 · 0 · 1 · 0

C in bass (1) · strings 2–6

Frets, thickest to thinnest: × · 3 · 0 · 0 · 0 · 0

G in bass (5) · strings 1–5

Frets, thickest to thinnest: 3 · 3 · 2 · 4 · 3 · ×

D in bass (9) · strings 2–6

Frets, thickest to thinnest: × · 5 · 2 · 5 · 0 · 3

B in bass (7) · strings 1–5

Frets, thickest to thinnest: 7 · 5 · 5 · 5 · 5 · ×

C in bass (1) · strings 1–5

Frets, thickest to thinnest: 8 · 7 · 0 · 0 · 0 · ×

E in bass (3) · strings 2–6

Frets, thickest to thinnest: × · 7 · 5 · 7 · 0 · 8

D in bass (9) · strings 1–5

Frets, thickest to thinnest: 10 · 10 · 10 · 9 · 0 · ×

G in bass (5) · strings 2–6

Frets, thickest to thinnest: × · 10 · 10 · 7 · 0 · 0

Detected Chords

Top interpretation

Cmaj7

Compare the alternatives below

Ranked interpretations of your voicing. Rootless readings infer an absent root; the notes alone may support several chord names.

Symbol	Root Note	Quality	Inversion / bass	Intervals
Cmaj7 Why this name? All played notes explained. Root in bass. C: 1 · root G: 5 · perfect fifth · doubled across 2 voices B: 7 · major seventh E: 3 · major third The same notes may have another name under a different root. Compare the tone roles in the other interpretations; bass and surrounding harmony help choose a reading.	C	maj7	root position C · 1 in bass	1 (C), 3 (E), 5 (G), 7 (B)
Em(addb13)/C Why this name? All played notes explained. C: ♭13 · flat thirteenth G: ♭3 · minor third · doubled across 2 voices B: 5 · perfect fifth E: 1 · root The same notes may have another name under a different root. Compare the tone roles in the other interpretations; bass and surrounding harmony help choose a reading.	E	m(addb13)	♭13 in bass C · ♭13 in bass	1 (E), ♭3 (G), 5 (B), ♭13 (C)
G6(add11)/C Omitted: 5 Why this name? All played notes explained. C: 11 · eleventh G: 1 · root · doubled across 2 voices B: 3 · major third E: 6 · major sixth Absent from this harmony: D (5, perfect fifth). These tones are not silently added to playback. The same notes may have another name under a different root. Compare the tone roles in the other interpretations; bass and surrounding harmony help choose a reading.	G	6(add11)	11 in bass C · 11 in bass	1 (G), 3 (B), 11 (C), 6 (E)
Em/C Why this name? Complete upper chord over a pedal bass. C: Non-chord pedal tone G: ♭3 · minor third · doubled across 2 voices B: 5 · perfect fifth E: 1 · root The same notes may have another name under a different root. Compare the tone roles in the other interpretations; bass and surrounding harmony help choose a reading.	E	m	non-chord bass C · pedal	1 (E), ♭3 (G), 5 (B)
Abmaj7(#5,#9)/C Rootless interpretation Omitted: 1 Why this name? All played notes explained. Root inferred from defining chord tones. C: 3 · major third G: 7 · major seventh · doubled across 2 voices B: ♯9 · sharp ninth E: ♯5 · augmented fifth Absent from this harmony: Ab (1, root). These tones are not silently added to playback. The same notes may have another name under a different root. Compare the tone roles in the other interpretations; bass and surrounding harmony help choose a reading.	Ab	maj7(#5,#9)	1st inversion C · 3 in bass	♯9 (B), 3 (C), ♯5 (E), 7 (G)

Selected Notes

String	Fret	Note	MIDI	PC	Interval
6	3	G	67	7	5
5	5	E	64	4	3
4	4	B	59	11	7
3	5	G	55	7	5
2	3	C	48	0	1

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Use the reference libraries to move from a detected chord name to practical fingerings, scales, progressions, and ear-training drills.

Browse chord shapes

Compare fingerings and voicings by chord quality.

Practice shell voicings

Learn compact guide-tone shapes for jazz comping.

Explore guitar scales

Review formulas, notes, and fretboard patterns.

Build a progression

Hear chord movement in a chosen key and style.

Compare chord formulas

See how chord qualities are built from intervals.

Train chord recognition

Practice identifying chord qualities by ear.

Shape-family explorer

Explore the same tone collection, reduce it to a root–third–seventh shell, or restore omitted tones and add a ninth. Shells simplify the colour; fuller versions may change the chord symbol.

InterpretationStarting string (thickest = 1)Bass degree

Current tuning · frets 0–15 · contiguous strings · one voice per tone · up to four adjacent frets. Shape suggestions, not prescribed fingerings.

Inversions and string sets · 12 shapes

Tones: C (1), E (3), G (5), B (7).

B in bass (7) · strings 2–5

Frets, thickest to thinnest: × · 2 · 2 · 0 · 1 · ×

C in bass (1) · strings 2–5

Frets, thickest to thinnest: × · 3 · 2 · 0 · 0 · ×

G in bass (5) · strings 1–4

Frets, thickest to thinnest: 3 · 3 · 2 · 4 · × · ×

E in bass (3) · strings 3–6

Frets, thickest to thinnest: × · × · 2 · 4 · 1 · 3

E in bass (3) · strings 1–4

Frets, thickest to thinnest: 0 · 2 · 5 · 5 · × · ×

G in bass (5) · strings 3–6

Frets, thickest to thinnest: × · × · 5 · 5 · 0 · 0

B in bass (7) · strings 1–4

Frets, thickest to thinnest: 7 · 7 · 5 · 5 · × · ×

E in bass (3) · strings 2–5

Frets, thickest to thinnest: × · 7 · 5 · 5 · 0 · ×

C in bass (1) · strings 1–4

Frets, thickest to thinnest: 8 · 7 · 9 · 0 · × · ×

B in bass (7) · strings 3–6

Frets, thickest to thinnest: × · × · 9 · 9 · 8 · 8

G in bass (5) · strings 2–5

Frets, thickest to thinnest: × · 10 · 10 · 9 · 0 · ×

C in bass (1) · strings 3–6

Frets, thickest to thinnest: × · × · 10 · 9 · 8 · 7

Shell voicings · 9 shapes

Tones: C (1), E (3), B (7).

Removed: G (5).

C in bass (1) · strings 2–4

Frets, thickest to thinnest: × · 3 · 2 · 4 · × · ×

E in bass (3) · strings 3–5

Frets, thickest to thinnest: × · × · 2 · 4 · 1 · ×

B in bass (7) · strings 4–6

Frets, thickest to thinnest: × · × · × · 4 · 1 · 0

B in bass (7) · strings 2–4

Frets, thickest to thinnest: × · 2 · 2 · 5 · × · ×

C in bass (1) · strings 4–6

Frets, thickest to thinnest: × · × · × · 5 · 5 · 7

C in bass (1) · strings 1–3

Frets, thickest to thinnest: 8 · 7 · 9 · × · × · ×

B in bass (7) · strings 1–3

Frets, thickest to thinnest: 7 · 7 · 10 · × · × · ×

B in bass (7) · strings 3–5

Frets, thickest to thinnest: × · × · 10 · 9 · 0 · ×

C in bass (1) · strings 3–5

Frets, thickest to thinnest: × · × · 10 · 9 · 12 · ×

Fuller versions · 10 shapes

Tones: C (1), E (3), G (5), B (7), D (9).

Added: D (9).

E in bass (3) · strings 1–5

Frets, thickest to thinnest: 0 · 2 · 0 · 0 · 1 · ×

B in bass (7) · strings 2–6

Frets, thickest to thinnest: × · 2 · 0 · 0 · 1 · 0

C in bass (1) · strings 2–6

Frets, thickest to thinnest: × · 3 · 0 · 0 · 0 · 0

G in bass (5) · strings 1–5

Frets, thickest to thinnest: 3 · 3 · 2 · 4 · 3 · ×

D in bass (9) · strings 2–6

Frets, thickest to thinnest: × · 5 · 2 · 5 · 0 · 3

B in bass (7) · strings 1–5

Frets, thickest to thinnest: 7 · 5 · 5 · 5 · 5 · ×

C in bass (1) · strings 1–5

Frets, thickest to thinnest: 8 · 7 · 0 · 0 · 0 · ×

E in bass (3) · strings 2–6

Frets, thickest to thinnest: × · 7 · 5 · 7 · 0 · 8

D in bass (9) · strings 1–5

Frets, thickest to thinnest: 10 · 10 · 10 · 9 · 0 · ×

G in bass (5) · strings 2–6

Frets, thickest to thinnest: × · 10 · 10 · 7 · 0 · 0

Symbol

Root Note

Quality

Inversion / bass

Intervals

Cmaj7

Why this name?

All played notes explained. Root in bass.

C: 1 · root
G: 5 · perfect fifth · doubled across 2 voices
B: 7 · major seventh
E: 3 · major third

The same notes may have another name under a different root. Compare the tone roles in the other interpretations; bass and surrounding harmony help choose a reading.

maj7

root position

C · 1 in bass

1 (C), 3 (E), 5 (G), 7 (B)

Em(addb13)/C

Why this name?

All played notes explained.

C: ♭13 · flat thirteenth
G: ♭3 · minor third · doubled across 2 voices
B: 5 · perfect fifth
E: 1 · root

The same notes may have another name under a different root. Compare the tone roles in the other interpretations; bass and surrounding harmony help choose a reading.

m(addb13)

♭13 in bass

C · ♭13 in bass

1 (E), ♭3 (G), 5 (B), ♭13 (C)

G6(add11)/C

Omitted: 5

Why this name?

All played notes explained.

C: 11 · eleventh
G: 1 · root · doubled across 2 voices
B: 3 · major third
E: 6 · major sixth

Absent from this harmony: D (5, perfect fifth). These tones are not silently added to playback.

The same notes may have another name under a different root. Compare the tone roles in the other interpretations; bass and surrounding harmony help choose a reading.

6(add11)

11 in bass

C · 11 in bass

1 (G), 3 (B), 11 (C), 6 (E)

Em/C

Why this name?

Complete upper chord over a pedal bass.

C: Non-chord pedal tone
G: ♭3 · minor third · doubled across 2 voices
B: 5 · perfect fifth
E: 1 · root

The same notes may have another name under a different root. Compare the tone roles in the other interpretations; bass and surrounding harmony help choose a reading.

non-chord bass

C · pedal

1 (E), ♭3 (G), 5 (B)

Abmaj7(#5,#9)/C

Rootless interpretation

Omitted: 1

Why this name?

All played notes explained. Root inferred from defining chord tones.

C: 3 · major third
G: 7 · major seventh · doubled across 2 voices
B: ♯9 · sharp ninth
E: ♯5 · augmented fifth

Absent from this harmony: Ab (1, root). These tones are not silently added to playback.

The same notes may have another name under a different root. Compare the tone roles in the other interpretations; bass and surrounding harmony help choose a reading.

maj7(#5,#9)

1st inversion

C · 3 in bass

♯9 (B), 3 (C), ♯5 (E), 7 (G)

String

Fret

Note

MIDI

Interval