To get from Am7 to Dm7, you move the G to F and the E to D while keeping the other two notes the same. To get from Cmaj7 to Am7, you just move the B to A while keeping the other three notes the same. You can see how the notes move very little from one chord to the next. Seeing things on the circle really helps you understand the voice leading. First, let’s look at the I-vi-ii-V jazz turnaround in C major. Here are some common chord progressions, and what their shapes can tell us about how they function. Once the Scale Wheel and aQWERTYon get combined, then whenever you play more than one note at a time, they will be connected on the circle. (We could make it blue if we knew it was flat fifth from Locrian mode, or green if it was the sharp fourth from Lydian mode.) I represented this ambiguity by making it blue-green. G-flat is a special case–it’s equally likely to be the sharp fourth or flat fifth. You could technically think of, say, B-flat as being the sharp sixth rather than the flat seventh, but that usage is rare in real life. Purple notes are perfect (neither major nor minor.) Green notes are major or natural. The colors represent the harmonic function of each note relative to the root C. Notice that C, D, E, G-flat, A-flat and B-flat are in the same places on both circles, while the other six notes trade places across the circle. These two circles have an interesting relationship: the circle of fifths is the involute of the chromatic circle. On the left is the chromatic circle, showing the notes in the order of pitch height (the way they are on a piano keyboard.) On the right is the circle of fifths. In this post, I’ll talk through some concept images.įirst, let’s look at two different ways to represent the pitch classes on a circle. My hypothesis is that seeing these shapes along with hearing the notes will help people learn music theory more easily. When you put the twelve pitch classes in a circle, you can connect the dots between different notes in a chord or scale to form shapes. The MusEDLab is planning to create a similar tool for visualizing music theory by merging the aQWERTYon with the Scale Wheel. The Groove Pizza uses geometry to help visualize rhythms.
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