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 The concept of the circle of fifths is not a new one (see this Wikipedia article for more information), but there is more to this simple, yet profound structure than the traditional diagram can easily convey. The Interactive Circle of Fifths goes beyond the limitations of a static diagram without sacrificing clarity and simplicity. This User's Guide will help you get the most out of the Circle, while introducing some basic music theory concepts. However, this is not intended to take the place of an introductory music theory course. Using the Circle Offline: You can easily download a copy of the Circle to use when you don't have an Internet connection: The Circle starts out with the key of C Major selected. (seven sharps) through C (seven flats). .
Related: General Theory