Making Sense of Music Theory: Intervals and Harmonic Function

Published on October 24, 2025

by Julian Vega

Music theory can often feel overwhelming and confusing, especially when it comes to understanding the concepts of intervals and harmonic function. However, having a solid grasp of these fundamental elements can greatly enhance your musical understanding and creativity. In this article, we will break down the basics of intervals and harmonic function, including how they work, why they are important, and how you can apply them in your own compositions. So let’s dive in and make sense of music theory together!Making Sense of Music Theory: Intervals and Harmonic Function

The Basics of Intervals

In music, an interval refers to the distance between two notes, measured in half steps. It is essentially the building block of melody, and understanding intervals is crucial for creating and understanding music. There are two types of intervals: harmonic and melodic.

Harmonic Intervals

Harmonic intervals are played simultaneously, meaning the two notes are played together to create a chord. These intervals are typically referred to as consonant or dissonant, depending on the quality of the sound they produce. Consonant intervals are pleasing to the ear, while dissonant intervals create tension and a sense of instability.

Melodic Intervals

On the other hand, melodic intervals are played sequentially, meaning the two notes are played one after the other. These intervals are referred to as steps or skips, depending on the distance between the two notes. Steps are considered to be smaller intervals, while skips are larger.

Understanding Harmonic Function

Harmonic function refers to the role that a particular interval or chord plays within a key or tonal center. It is essentially the relationship between notes and how they relate to each other within a piece of music. There are three main types of harmonic function: tonic, dominant, and subdominant.

Tonic Function

The tonic is the most stable and central note in a key. It acts as a home base to which all other notes and chords relate. Tonic intervals and chords are typically used to create a sense of resolution and calmness.

Dominant Function

The dominant is typically the fifth note of a scale and is considered to be the strongest after the tonic. It creates tension and leads the listener to expect resolution to the tonic. The dominant is often used in chord progressions to create a sense of movement and direction.

Subdominant Function

The subdominant is the fourth note of a key and is considered to be a weaker form of the dominant. It is often used to transition between the tonic and dominant and creates a sense of stability and balance.

Applying Intervals and Harmonic Function in Music

Now that we have a better understanding of intervals and harmonic function, let’s explore how we can apply these concepts in our own musical compositions.

Firstly, intervals can be used to create melodies and harmonies that are pleasing to the ear. By understanding the differences between consonant and dissonant intervals, we can manipulate the mood and emotion of our music. Experiment with different intervals and see how they affect the overall sound of your composition.

Secondly, harmonic function can be used to create chord progressions that flow smoothly and have a sense of purpose. By understanding the roles of tonic, dominant, and subdominant chords, we can create interesting and dynamic progressions that keep the listener engaged. Don’t be afraid to try out different progressions and see how they sound within the key you are working in.

Lastly, understanding intervals and harmonic function can also assist in improvisation and soloing. By knowing which notes and chords will sound good together, you can create intricate melodies and solos that not only sound impressive but also make sense musically.

In Conclusion

Intervals and harmonic function are crucial elements in music theory that can greatly enhance your understanding and creativity. By having a solid grasp of these concepts, you can create more complex and interesting compositions, as well as improve your overall musicianship. So the next time you come across the terms intervals and harmonic function, remember to make sense of them and apply them in your own musical journey.

Remember, practice makes perfect, and the more you familiarize yourself with these concepts, the easier they will become. So keep exploring, creating, and making sense of music theory!