Major-minor Seventh Chord

Definition

A major-minor seventh chord, often referred to as a dominant seventh chord, consists of a root, major third, perfect fifth, and minor seventh. This chord typically functions as a dominant chord in harmonic progressions, creating tension that resolves to the tonic chord. It plays a vital role in establishing key relationships and modulations, particularly in the context of secondary dominants.

5 Must Know Facts For Your Next Test

1. The major-minor seventh chord consists of four notes: the root, major third, perfect fifth, and minor seventh.
2. When functioning as a dominant seventh chord, it typically resolves down a fifth to the tonic chord, creating strong harmonic motion.
3. In part writing, it's important to avoid parallel fifths and octaves when resolving a major-minor seventh chord to maintain voice leading integrity.
4. The presence of the minor seventh creates dissonance that adds richness and depth to harmonic progressions.
5. Secondary dominant chords often use major-minor seventh chords to temporarily shift the tonal center before resolving back to the original key.

Review Questions

• How does the major-minor seventh chord function within harmonic progressions, specifically regarding its resolution?
  • The major-minor seventh chord functions primarily as a dominant seventh chord that creates tension which seeks resolution. When it appears in a progression, it usually resolves down by a fifth to the tonic chord, completing the harmonic motion. This resolution reinforces the relationship between the dominant and tonic chords, establishing a sense of closure and stability in music.
• Discuss how secondary dominants utilize major-minor seventh chords to achieve tonicization of non-tonic chords.
  • Secondary dominants employ major-minor seventh chords by temporarily introducing tension that resolves to non-tonic chords. For example, if we take the dominant seventh of the ii chord in a key, it creates a strong pull towards that ii chord. This use of major-minor seventh chords allows composers to create momentary shifts in tonal focus, making the progression more dynamic and engaging.
• Evaluate how voice leading principles impact part writing when using major-minor seventh chords and their resolutions.
  • Voice leading principles are crucial in part writing with major-minor seventh chords as they ensure smooth transitions between harmonies. When resolving these chords, it's essential to avoid parallel fifths and octaves among voices to maintain harmonic clarity. Additionally, proper movement of each voice contributes to balanced tensions and releases within progressions, allowing for effective conveyance of musical ideas while adhering to traditional part writing practices.

Related terms

Dominant Seventh Chord:

A dominant seventh chord is built on the fifth degree of a scale and includes a major triad plus a minor seventh, typically resolving to the tonic.

Secondary Dominant: A secondary dominant is a dominant chord that resolves to a chord other than the tonic, temporarily tonicizing a different scale degree within the original key.

Tonicization:

Tonicization refers to the process of treating a non-tonic chord as if it were the tonic for a brief period, often achieved through the use of secondary dominants.