# G♭ Augmented 7th piano chord (G♭aug7) G♭aug7 contains G♭, B♭, D and F♭. An augmented triad with the minor seventh added on top. G♭ and B♭ are black keys; D and F♭ are white. - Canonical page: https://piano.org/chords/augmented-7th/g-flat/ - Entity: chord:augmented-7th:g-flat - Notes: G♭ B♭ D F♭ - Formula: 1 3 ♯5 ♭7 - Intervals from root: P1, M3, m6, m7 - Interval stack (semitones): 4 4 2 - Also written: G♭aug7, Gbaug7, G♭ augmented 7th - Parameters: A440, 12-TET, 165 mm octave, spans centre to centre ## Construction | Degree | Note | Interval from root | Semitones | | --- | --- | --- | --- | | 1 | G♭ | Perfect unison | 0 | | 3 | B♭ | Major third | 4 | | ♯5 | D | Minor sixth | 8 | | ♭7 | F♭ | Minor seventh | 10 | ## Fingering Rest your right hand over the notes with finger 2 on G♭, finger 3 on B♭, finger 4 on D, finger 5 on F♭. The left hand mirrors it. Right hand 2-3-4-5, left hand 5-4-3-2. Source: piano.org fingering method v1. ## Inversions | Position | Bass | Notes in order | Figured bass | Span | | --- | --- | --- | --- | --- | | Root position | G♭ | G♭3 B♭3 D4 F♭4 | 7 | 10 st, 138 mm | | First inversion (G♭aug7/B♭) | B♭ | B♭3 D4 F♭4 G♭4 | 6/5 | 8 st, 110 mm | | Second inversion (G♭aug7/D) | D | D4 F♭4 G♭4 B♭4 | 4/3 | 8 st, 110 mm | | Third inversion (G♭aug7/F♭) | F♭ | F♭4 G♭4 B♭4 D5 | 4/2 | 10 st, 138 mm | ## Voicings (10) | Voicing | Notes | Span | Relation | Omits or adds | | --- | --- | --- | --- | --- | | Close, root position | G♭3 B♭3 D4 F♭4 | 10 st, 138 mm | identical | none | | Close, first inversion | B♭3 D4 F♭4 G♭4 | 8 st, 110 mm | identical | none | | Close, second inversion | D4 F♭4 G♭4 B♭4 | 8 st, 110 mm | identical | none | | Close, third inversion | F♭4 G♭4 B♭4 D5 | 10 st, 138 mm | identical | none | | Drop 2 | D3 G♭3 B♭3 F♭4 | 14 st, 193 mm | identical | none | | Drop 3 | B♭2 G♭3 D4 F♭4 | 18 st, 248 mm | identical | none | | Drop 2 and 4 | G♭2 D3 B♭3 F♭4 | 22 st, 303 mm | identical | none | | Shell, root ♭7 3 | G♭2 F♭3 B♭3 | 16 st, 220 mm | subset | omits D | | Guide tones, 3 and ♭7 | B♭3 F♭4 | 6 st, 83 mm | subset | omits G♭ and D | | Rootless close | B♭3 D4 F♭4 | 6 st, 83 mm | subset | omits G♭ | ## One-edit neighbors | Becomes | Edit | Changes | Common tones | | --- | --- | --- | --- | | G♭aug | 1 3 ♯5 | drops F♭ | 3 | | G♭7 | 1 3 5 ♭7 | D becomes D♭ | 3 | | G♭9 | 1 3 5 ♭7 9 | D becomes D♭, A♭ | 3 | | G♭ | 1 3 5 | D, F♭ becomes D♭ | 2 | | G♭maj7 | 1 3 5 7 | D, F♭ becomes D♭, F | 2 | | G♭m7 | 1 ♭3 5 ♭7 | B♭, D becomes B♭♭, D♭ | 2 | | G♭m7♭5 | 1 ♭3 ♭5 ♭7 | B♭, D becomes B♭♭, D♭♭ | 2 | | G♭7sus4 | 1 4 5 ♭7 | B♭, D becomes C♭, D♭ | 2 | | G♭6 | 1 3 5 6 | D, F♭ becomes D♭, E♭ | 2 | | G♭add9 | 1 3 5 9 | D, F♭ becomes D♭, A♭ | 2 | ## Set theory - Absolute pitch classes: {6, 10, 2, 4} - Relative pitch classes: [0, 4, 8, 10] - Normal order: [2, 4, 6, 10] - Prime form: (0248) - Forte number: 4-24 - Interval vector: <020301> ## Frequencies (close root position) | Note | MIDI | Frequency | | --- | --- | --- | | G♭3 | 54 | 185.00 Hz | | B♭3 | 58 | 233.08 Hz | | D4 | 62 | 293.66 Hz | | F♭4 | 64 | 329.63 Hz | ## Questions and answers ### What notes are in G♭aug7? G♭aug7 contains G♭, B♭, D and F♭. The formula is 1, 3, ♯5, ♭7. ### How do you play G♭aug7 on piano? Play G♭, B♭, D and F♭ together. Right hand fingers 2, 3, 4, 5; left hand 5, 4, 3, 2. G♭ and B♭ are black keys; D and F♭ are white. ### What are the inversions of G♭aug7? 4 positions: root position G♭ B♭ D F♭, G♭aug7/B♭, G♭aug7/D, G♭aug7/F♭. ### What is the difference between G♭aug7 and G♭aug? Drops F♭. 3 of the notes are shared. ### What is an easy G♭aug7 for small hands? The guide tones, 3 and ♭7 voicing, B♭3 F♭4, spans 6 semitones or about 83 mm. ### What are the frequencies of G♭aug7? From G♭3 at A440 in 12-TET: 185.00, 233.08, 293.66, 329.63 Hz. ### What is the set class of G♭aug7? Prime form (0248), Forte 4-24, interval vector <020301>. ### How do I transpose G♭aug7 to another key? Keep the 1, 3, ♯5, ♭7 formula on the new root. Caug7 is C, E, G♯, B♭; D♭aug7 is D♭, F, A, C♭. ### Is F♯aug7 the same as G♭aug7? Enharmonically yes: the same piano keys and the same sound, spelled differently. ## Provenance Every derived value above is computed by the piano.org theory kernel from the root, the quality and the stated parameters. Nothing is hand-entered per chord. Machine record: https://piano.org/api/knowledge/v1/entities/chord:augmented-7th:g-flat Last reviewed: 2026-08-12