Theory lesson - The circle of fifths, expertly explained using a 12-slice pizza The 12 tones of the chromatic scale, their corresponding key signatures, and the associated major and minor keys. All on a pizza. 1. ...trust us, all will be clear soon. 2. Let us begin 3. Major keys Major keys 4. Minor keys 5. Sharps and flats 6. Major/minor, key relationships in pizza 7. C major is boring 8. The most sharps 9. Mmmmmm, enharmonic 10. Thank you for your attention