What is an interval in music?
An interval is the distance in pitch between two sounds.
If you play two notes in a row, there will always be some distance between them. One note may be very close to another, or it may be noticeably higher or lower. This distance is called an interval.
For example, play the open first string E on guitar, then the first fret F. These sounds are very close: there is one semitone between them. Now play E and the third fret G. The distance is larger. Your ear hears it differently.
Before this topic, it helps to understand tones and semitones. On guitar, one fret usually equals one semitone, so intervals are convenient not only to hear, but also to see on the fretboard.
You can hear an interval in two ways.
The first way is to play two notes one after another. This is called a melodic interval. It appears in melodies, riffs, vocal phrases, and solos. For example, when a melody moves up from C to E, you hear the movement between two sounds.
The second way is to play two notes at the same time. This is called a harmonic interval. It appears inside chords and sonorities. If you play C and G together, you hear not movement, but a combination of two sounds.
For a beginner, it is more important to understand the basic idea than to memorize the names of all intervals right away: an interval is not a separate note, but the distance between two notes.
Small interval example
In this example, the first note is always C, and the second note changes. The farther the second note is from the first, the wider the interval. On one string, this is easy to see: more frets between the notes means a greater distance in pitch.
Intervals are not only for theory. Almost everything a musician plays and hears is built through them.
A melody is movement through intervals. If notes move in small steps, the melody sounds smoother. If larger leaps appear, the melody becomes more noticeable and expressive.
A chord is several sounds with intervals between them. For example, the character of a major or minor chord depends a lot on the distance between the main note and the third scale degree. That is why one changed interval can change the feeling of the whole chord.
A scale is a set of sounds arranged by certain distances. If you change the order of tones and semitones, you get a different scale with a different character.
On guitar, intervals are especially useful because you can see them as shapes. If you know where the first note is, you can look for other sounds from it not only by names, but also by distances on the fretboard.
For example, on one string everything is simple: one fret is a semitone, two frets are a tone, twelve frets are an octave. Later, you will see that the same intervals can also be found across neighboring strings. This helps you understand chords, scales, and fingerings faster.
You can check intervals by ear in the interval trainer. But do not turn practice into a guessing game. First, listen to the feeling: is the sound close or wide, stable or tense, does it want to resolve somewhere?
5-minute exercise
- Play C on the fifth string, third fret.
- Play D on the fifth string, fifth fret.
- Return to C and play E on the seventh fret.
- Return to C and play G on the tenth fret.
- Each time, compare the distance: is the second sound close to the first or far from it?
- Repeat the same pairs with your eyes closed and try to describe the feeling in words.
The main goal is to hear an interval as a distance, not just as two separate notes.
Common confusion
An interval is not a note. A note is a separate sound or its name. An interval appears only when there are two sounds and a distance between them.
An interval is not a chord. A chord can consist of several intervals, but an interval itself is the distance between two sounds.
You do not need to name an interval with a complex term right away. At the first stage, it is enough to hear: close, wide, up, down, stable, tense.
The same interval can be played in different places on the fretboard. The shape may change, but the distance in pitch stays the same.
What to study next
After this topic, it is logical to move to nearby materials:
The main idea: an interval is the distance in pitch between two sounds. When you begin to hear and see these distances, it becomes easier to understand melodies, chords, scales, and movement on the fretboard.