New Musical Theory Model Based on the Dodecahedron. We know about the circle of fifths. A quick review: In music theory, the circle of fifths (or circle of fourths) is the relationship among the 12 tones of the chromatic scale. It shows their corresponding key signatures. Also found arethe associated major and minor keys. Musical tones use 7 letters of the alphabet. They are A-B-C-D-E-F-G. These letters repeat over and over to encompass the full key signature span.
New Musical Theory Model in Featured Picture
Mesolithic Times Had a Unique Standard
Click on the above internal link. It offers background on the 5 Platonic solids. The Platonic Solid we are concerned with here is the dodecahedron. In antiquity it symbolized the overall shape of the Universe. By this rational,we live in a musical Universe. As for the featured picture, note: The major keys are written in the center of each pentagon. Start in consecutive order (from C major) from its lower left point. The tone on the lower right completes the 5 tones. In the case of “C” major, it is the tone “G”. This lower right begins the next pentagon. It is completed at “D” …
- Ascend 5 consecutive tones with each pentagon.
- The fifth tone on the lower right of each pentagon defines the key signature name of the next pentagon. This goes for the complete cycle: “G major, D major, A major…”
- The 12 pentagons make the complete cycle at F major. “F” major’s lower right hand tone is “C”. The outline of the dodecahedron is complete at this point.