Plagal Fourth Mode "Triphonos"

Many Plagal Fourth Mode hymns are sung in the Eirmologic style from Ga. This Ga is often notated with a Ne phthora placed above it. Because Ga is three notes above the normal Plagal Fourth primary note, Ne, this variant is called "Triphonos". All Plagal Fourth Mode Apolytikia are in this form of the mode.