# Intervals Part I

The first thing you need to learn for fret-board mastery is **musical intervals**. There are 12 types of intervals since there are 12 different notes. Intervals are a way of describing a sonic relationship between 2 different notes. In this lesson all of the intervals are relative to an E note, so we begin with an open E string before we play each of the 12 intervals.

**Intervals Part 1:**

Out of the 12 intervals, there are **4 Perfect intervals** and **8 Imperfect intervals**.

A perfect interval has no major or minor version and includes the Unison, Octave, 4th and the 5th.