Aspen live edge board finished with linseed oil and lacquer. Image is the circle of fifths with Pythagoras (who some say invented the circle of fifths) in the center.  Image size is 9.5″ x 10″.

In music theory, the circle of fifths (or circle of fourths) is the relationship among the 12 tones of the chromatic scale, their corresponding key signatures, and the associated major and minor keys. More specifically, it is a geometrical representation of relationships among the 12 pitch classes of the chromatic scale in pitch class space.