Disagreement

Osmoglasie ( osmoglasie , oktoh , other Greek Ὀκτώηχος , from ὀκτώ “eight” + ἦχος “voice”) is a musical-theoretical system that describes the modes of liturgical Byzantine music , as well as the procedure for their use in liturgical practice.

The origins of osmoglasiya go back to the frets and chants of ancient Greek music . In this system, the hymns were composed by Andrey Kritsky , Roman Sladkopevets , Jacob of Edessa and other masters. Theoretically, the system of osmosis was comprehended and streamlined in the writings of John of Damascus (VIII century), after which it was entrenched in liturgical practice. Typologically, disagreement is similar to church frets of Gregorian singing , the fret system of the Armenian monody and other systems of medieval Christian music.

According to modal features, liturgical songs are classified into 8 voices . The songs of one voice were sung for a week, after which they were replaced by songs following the serial number of the voice. The eight-week cycle of songs from the 1st to the 8th voice formed the so-called pillar; songs of the holidays, according to the voice, might not coincide with the weekly ones. The voices were divided into primary (authentic) and indirect (plug-in). The authentic ones included: Dorian , Phrygian , Lydian and Mixolidian .

The plagued were built in such a way that the tonic of each authentic system was the fourth stage of the plug-in, while maintaining the original value.