There are several types of intervals, like perfect and nonperfect. Music notation and theory for intelligent beginners. I have played various instruments over 24 years and because of harnums matter of fact, conversational tone, this book has lent more to my understanding of basic music theory than all my private instructors combined. The main purpose of the course, however, is to explore basic music theory so thoroughly that the interested student will then be able to easily pick up whatever further theory is wanted. While there are many ways to determine and label intervals, we will focus on the most basic elements. Complete piano theory course chords, intervals, scales. Basic music theory for adult beginner level piano players. Music intervals identify each interval by size and type.