Plato and Aristotle create philosophies about music and the doctrine of Ethos. First modal system in tetrachords and modes. The doctrine of ethos and the power of music is really big in this time.
Musical educational system is established. Liberal arts begin to take form. Trivium: grammar, rhetoric and mathematics. Quadrivium: mathematics, geometry, music, and astronomy. Boethius and the true musician.
Constantine is Christian and recognizes is it as the faith of the people. The rise of different chants and the melodic lines were put into modes. Many chants are starting to take form, Byzantine, Roman, Ambrosian, Celtic, Frankish or Gallican chant, and Mozarabic chant.
Pope Gregory organizes the chants into a book so the church has unfied source for music. The liturgical year is established and so is the ordinary and the proper of the mass. Neumes are being formed for notation of music and so as forms. Guido of Arrezo came up with a notation with Guido's hand. The rise of Tropes with Hildegard of Bingen and the liturgical drama.
Goliards, minstrels, and troubadours. German bar form with a stollen and an abesang. Rise of instrumental use and the estampie. Polyphony and organum with Perotin and Leonin. The school of Notre Dame and the rise of structure and organization. The use of rhythmic modes and discant clausula.
The church is seen as fallible and the world has lost faith in the church and is moving away from the church. The black death is killing everyone in large numbers. The text is being written in the vernacular. Phillipe de Vitry and the Ars Nova Treaty; the development of the mensural system, Form Fixes; ballade, virelai, rondeau. Guillaume De Machaut is the composer of this time with motets and the contratenor. Ars sbtillior, a subtle art but more complicated with the organization of rhythms and beats. The Italian trecento and madrigals.