The Circle Of Fifths

Interactive Circle of Fifths User's Guide
The Interactive Circle of Fifths ("the Circle" for short) is a tool designed to help musicians to:

* figure out the key of a piece of music
* easily transpose music to a different key
* compose new music
* understand key signatures, scales, and modes

In many of my workshops, I teach an intro to the circle of fifths as a way of beginning to understand basic music theory. This is an excellent expose' on the circle and some of the ways in which it can be utilized.