| Tertian | A chord structure built of thirds.
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| Triad | A three-note chord consisting of a 5th divided into two superimposed 3rds. The bottom note of the 5th is the root, and the top note is the 5th.
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| Seventh Chords | A triad with another 3rd added above the 5th of the triad. The added note is a 7th above the root.
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| Major Seventh Chord (M7) | Major triad with a M7 above the root.
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| Major-Minor Seventh Chord (Mm7) | Major triad with a m7 above the root.
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| Minor Seventh Chord (m7) | Minor triad with a m7 above the root.
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| Bass Position | The chord member that is in the lowest sounding voice.
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| Root Position | A chord with the root notated as the lowest tone.
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| Inversion | The transfer of the lowest note to some higher octave.
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| First Inversion | A chord with the 3rd as the lowest tone.
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| Second Inversion | A chord with the 5th in the bass.
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| Third Inversion | A seventh chord with the 7th as the lowest tone.
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| Figured Bass | A method of abbreviated notation used in the Baroque era.
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| Lead Sheet Symbols | Used in jazz and most popular music to indicate chords to be played under a given melody.
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| Pitch Classes | Term used to group together all pitches that have an identical sound or that are identical except for the octave or octaves that separate them.
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