C1A | 7^th chords

What are 7^th chords?

• 7^th chords are created when 7^th intervals are added above the root of triadic chords.
• There are many examples of 7^th chords and the most common ones will be discussed.
• What about starting with the chord of the dominant 7^th?
• This chord is created by adding an interval of a minor 7^th above the root of a major triad.

Notice the top note in each chord. It creates a minor 7^th interval with the bottom note (the root). The second chord in each bar shows the resolution to the tonic chord each time.

1. This chord is called the dominant 7^th chord because it contains the triadic notes of the dominant degree of the scale in any key, and the added 7^th note that exists in that key.
2. Since the interval of a 7^th creates a discord, it needs to be resolved; usually to a tonic chord, creating a perfect cadence in a major or minor key.
3. If the dominant 7^th is left suspended without being resolved, it’s a chord that creates an incomplete sensation.

Listening to dominant 7^th chords

Watch the video below to see and hear the melody and the chords employed. It comes from Beethoven’s Symphony no. 5. Since movements 3 and 4 follow each other without a break, the example given begins in 00:33.