Dominant seventh chords are four-note chords consisting of a major triad with an added minor seventh. They have a strong, unresolved sound and are commonly used to create tension and lead to the tonic chord in a musical piece.
Think of dominant seventh chords as the spicy seasoning in a dish. Just like how adding spice can make a meal more exciting and flavorful, using dominant seventh chords adds excitement and tension to music.
Tonic Chord: The tonic chord is the main chord or home base of a musical key. It provides stability and resolution after the tension created by dominant seventh chords.
Subdominant Chord: The subdominant chord is the fourth scale degree in a key. It has a less tense sound compared to dominant seventh chords but still provides some harmonic interest.
Leading Tone: The leading tone is the seventh scale degree that leads strongly to the tonic. It creates tension when used in conjunction with dominant seventh chords.
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