The Gm7b5 chord contains G, B♭, D♭ and F. Also written Gm7♭5 or Gø7, it combines a diminished triad with a minor seventh. Compare root position and three inversions.
Build the Gm7b5 chord by lowering D in G minor seventh to D♭. Retain G, B♭ and F. Its formula is 1–♭3–♭5–♭7. G–D♭ spans six semitones, while G–F spans ten; changing the fifth does not change the minor third or seventh.
Preserve the written chord spelling shown here; keyboard equivalence does not rename the chord.
Choose a position to keep the four written notes, sounding keys, bass note, playback and print reference synchronized.
Build the Gm7b5 chord with G, B♭, D♭ and F. D natural gives Gm7 instead. Choosing E in place of F sounds the diminished seventh F♭ above G. This exercise compares pitch classes without inferring inversions from click order or assessing live playing.
Gm7♭5 uses 1–♭3–♭5–♭7: G–B♭–D♭–F.
a diminished triad plus a minor seventh
Compared with G diminished, add the minor seventh above the root.
A seventh chord has four chord tones and therefore four positions: root position plus three inversions. The slash symbol identifies the written bass note.
| Position | Symbol | Notes, low to high | Bass |
|---|---|---|---|
| Root position, current selection | Gm7♭5 | G3–B♭3–D♭4–F4 | G3 |
| First inversion | Gm7♭5/B♭ | B♭3–D♭4–F4–G4 | B♭3 |
| Second inversion | Gm7♭5/D♭ | D♭4–F4–G4–B♭4 | D♭4 |
| Third inversion | Gm7♭5/F | F4–G4–B♭4–D♭5 | F4 |
The Gm7b5 chord diagrams show notes and octaves without assigned fingers. B♭ starts the first inversion, D♭ the second and F the third. Retain both flat signs in each position; the selected bass and note order are references rather than required hand shapes.
Use the written notes, keyboard positions and playback without treating the diagram as a required hand shape.
Read left- and right-hand finger numbersOpen Music Theory
Supports: Half-Diminished Seventh chord construction, written spelling and inversion principles
Scope: Supports theory and spelling only; keyboard layouts are PianoGrid examples, and no fingering is assigned.
G, B♭, D♭ and F: root, minor third, diminished fifth and minor seventh. The fifth is D♭ rather than D natural.
Both identify the Gm7b5 chord. The slashed circle marks half-diminished quality; m7♭5 describes a minor seventh chord with a lowered fifth.
The Gm7b5 chord uses F, a minor seventh. Gdim7 uses F♭, a diminished seventh, sounding on E. Both retain G, B♭ and D♭.
B♭, D♭ and F begin the first, second and third inversions. The Gm7b5 chord begins on G in root position. The selector synchronizes notes, bass, keyboard and reference sound.
Select the four pitch classes that make Gm7♭5, then check your answer.
This one-octave exercise checks the exact four-note pitch-class set. Order and inversion do not affect the result; missing and extra notes are reported, while fingering and live performance are not assessed.
One octave, C through B. Select a key again to remove it.
Chord tones: G–B♭–D♭–F · Formula: 1, ♭3, ♭5, ♭7
Dots mark the notes to play. C4 is middle C. Numbers identify octaves, not fingers.