Introduction to Music Theory Chapter 4 – Intervals Each chapter contains multiple topics. Once you complete a topic be sure you mark it completed and you’ll see green dots fill each topic below. Chapter Lessons 4.1 Basic Intervals 4.2 Seconds and Thirds 4.3 Perfect Intervals and Inversions 4.4 Sixths, Sevenths, and all Inversions 4.5 Intervals In the Major Scale 4.6 Intervals In the Minor Scale 4.7 Review Appendix 3 - Frequency and Consonance ← Previous Lesson