Oganon.

Alcannon refers to a form that appeared in Western music in the 9th century AD. It was the earliest polyphonic music to be recorded and spread widely. Organon is divided into two main forms, Disconte and Condoctus. Disconte is a simpler form of polyphony with clear rhythm and relatively parallel movements of voices; Kondoctus is more developmental and artistic, freer in structure, and includes voices with multiple different roles and styles. department.