+**D7** often signifies a fundamental element, commonly recognized as a [Dominant](/wiki/Dominant) seventh chord in music. It introduces a subtle tension, propelling harmony towards resolution within a musical [Key](/wiki/Key). This rich chord adds distinct color to compositions.
+## See also
+- [Chord](/wiki/Chord)
+- [Seventh Chord](/wiki/Seventh_Chord)
+- [Harmony](/wiki/Harmony)
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