Today's topic: "What is a perfect octave?" In this video you will learn how to construct and identify a perfect octave interval in 30 seconds. Including some examples and common mistakes.
An interval is the distance between two notes.
To identify an interval you must:
1 (number) - count the amount of naturals
2 (quality) - count the semitone steps
In music theory, a octave (perfect, diminished or augmented) is the interval between a natural and the eighth one above it. For example, the interval between tones C and C is an octave, but the interval between B and B flat is as well.
Additionally, a perfect octave consists of 12 semitones and is abbreviated with P8.
Common mistakes are often made when the notes of an interval use different naturals, but musically sound the same. An example of this would be a E to a F flat. Or C to B sharp. Which are both different intervals, but sound like a perfect octave.
This may sound a little confusing at first, and it probably is. But when advancing in music theory it is an essential skill to understand. With it, you will be able to create chords, scales and progressions.
So, to correctly construct or identify a perfect octave make sure that you count eight naturals. And there are twelve semitones between the notes.
That's it, you can now use the perfect octave!
After watching the video, you can read about [what a perfect octave is](https://sonid.app/musictheory/interval/perfect-octave).
