text: Lydian cadence: The Lydian-half cadence is similar to the Phyrgian-half, involving iv6-V in the minor, the difference is that in the Lydian-half, the whole iv6 is raised by 1/2 step - in other words, the Phrygian-half begins with the first chord built on scale degree P4 and the Lydian-half is built on the scale degree 4+ (augmented 4th).