There’s More to Playing the Piano

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Chapter 12 - Traffic Light Diagram

The traffic light diagram is not an essential diagram for understanding music theory. But it is a useful shortcut for learning every major chord shape on the piano. ◯ denotes a white note ⬤ denotes a black note It is not necessary to draw a separate diagram for minor chords. To create a minor chord, simply flatten the middle note of the chord (known as the third); for example, C major (C E G) becomes C minor (C Eb G) ...