Discover an easy method to work out and accurately identify intervals using this simple interval chart. In music, an interval is a measured distance between two notes. When the notes sound at the same time it is called a harmonic interval; when one note comes after another it is called a melodic interval. Each interval has a particular name and in this music theory lesson the whole system is explained, along with a method for calculating intervals accurately. This is a great resource for any musician. Besides giving a reliable method for calculating intervals this music theory lesson will also assist musicians with transposition and other musical skills.