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Music theory definition

Dominant seventh

A major triad plus a minor 7th, like G7. It drives strongly to I.

Hear an example

Play the example and listen for the idea described above.

A tritone inside

in C = G B D F. B and F form a that resolves: B → C, F → E.

Learn it in context

This term is introduced in Unit 11: Seventh chords. Work through the explanations and exercises to connect the definition with music.

Seventh chord
A triad with a fourth note a 7th above the root.
Half-diminished seventh
A diminished triad plus a minor 7th (ø7), like Bø7.
Diminished seventh
A diminished triad plus a diminished 7th (°7) - four notes, all a minor 3rd apart.
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