1.9 Intervals
Category: Harmony  Tags: Intervals 
Theory
In this chapter you will learn about intervals. In the video, I show what intervals are and you'll learn the names of the 7 most important intervals. You are going to practice these names. In Ear training, you will hear how these 7 intervals sound.
1. What is an interval?
When you make music, you play tones with different pitches. Regardless of the instrument you play  whether you play notes in sequence or at the same time, you play tones of higher and lower pitch. The difference between a higher and a lower tone is called an interval.
An interval measures the distance between two notes.
Therefore, intervals are always made up of 2 tones. For example, if you play 3 tones, that is not called an interval.
The easiest way to determine the distance between 2 tones is to count the white keys on the piano. Count from the lowest to the highest white key to determine the number of that distance. Note: the lowest key is '1' ! Below, you can see an example of an interval with a distance of 5.
2. What are the names of the intervals?
If you can count the distance between 2 tones, then you will know its name! The names of intervals are numbers.
There are 7 important common intervals. These are:
 second, interval of 2 steps
 third, interval of 3 steps
 fourth, interval of 4 steps
 fifth, interval of 5 steps
 sixth, interval of 6 steps
 seventh, interval of 7 steps
 octave, interval of 8 steps
Video
Examples
What are the names of the intervals?
3. Practise
Harmony exercise 1b: practise the names of the intervals.
4. Ear training
Listen to the sound of the intervals.
The second C D
The third C E
The fourth C F
The fifth C G
The sixth C A
The seventh C B
The octave C C
Summary
An interval measures the distance between two notes.
There are 7 important common intervals. These are:
 An interval of 2 steps is called a second
 An interval of 3 steps is called a third
 An interval of 4 steps is called a fourth
 An interval of 5 steps is called a fifth
 An interval of 6 steps is called a sixth
 An interval of 7 steps is called a seventh
 An interval of 8 steps is called a octave
