Here are two variations on one chord progression. While the first lives primarily in A harmonic minor, the second one contains a chromatic shift that unlocks an unusual cadence. Extending this run of fourths to include a B flat provides another interesting way home.
What you just heard is the unlock code for what we call the Neapolitan sixth. Put that under your fingers, resolve it to major or minor, and share it with someone who belongs in a B kitchen glass. (light music)
