Post-Tonal Theory: Base 12 Counting

The video tutorial explains the concept of pitch classes in music theory, highlighting the use of enharmonic equivalency and the fixed do system where pitch Class C is assigned the number 0. It discusses why numbers 0 through 11 are used instead of 1 through 12, emphasizing the mathematical reasoning behind this choice. The tutorial uses a clock face analogy to illustrate how pitch classes repeat in a cycle, similar to how hours repeat on a clock. It concludes with a brief introduction to interval classes, setting the stage for future lessons.

What is the relationship between pitch classes and enharmonic equivalency?

Describe the process of determining the pitch class when starting on a D flat and going down three half steps.