Augmented 6th Chord Formula:
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An augmented sixth chord is a chord that contains the interval of an augmented sixth, built on the flattened submediant (the 6th degree of the scale). These chords typically resolve outward to an octave on the dominant note.
The calculator uses the following formulas for each type of augmented 6th chord:
Italian Aug6: root + root + 6 semitones + root + 10 semitones
French Aug6: root + root + 6 semitones + root + 8 semitones + root + 10 semitones
German Aug6: root + root + 6 semitones + root + 9 semitones + root + 10 semitones
Italian Aug6: Contains the root, augmented 6th, and major 3rd above the root (three-note chord).
French Aug6: Adds a perfect 4th above the root to the Italian form (four-note chord).
German Aug6: Adds a perfect 5th above the root to the Italian form (four-note chord).
Tips: Select the root note and chord type from the dropdown menus. The calculator will display the notes that make up the specified augmented 6th chord.
Q1: What's the difference between augmented 6th chords and dominant 7th chords?
A: While they may sound similar, augmented 6th chords resolve outward to an octave on the dominant, while dominant 7th chords resolve inward.
Q2: Why are there different types of augmented 6th chords?
A: The different types (Italian, French, German) provide varying levels of harmonic richness and voice-leading possibilities.
Q3: In what musical contexts are augmented 6th chords used?
A: They're commonly used as pre-dominant chords in classical music, creating strong tension that resolves to the dominant.
Q4: Can augmented 6th chords be used in jazz or pop music?
A: While less common, they can be used for dramatic effect in these genres, particularly in more harmonically adventurous compositions.
Q5: How do I spell an augmented 6th chord correctly?
A: The augmented 6th interval should always be spelled as a minor 6th above the root (e.g., in C, it's A♭ not G#).