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The medieval Russian Kondakar and the choirbook from Kastoria: a palaeographic study in Byzantine and Slavic musical relations

The Byzantine choirbook or Asmatikon was a musical anthology of melismatic chants for the Office and Liturgy of the fixed and movable parts of the Church year. With its counterpart for the soloist, the Psaltikon, the Asmatikon flourished in the twelfth and thirteenth centuries and was then superseded in the fourteenth and fifteenth by a new manuscript type known as the Akolouthia, which absorbed much of the material from the older sources and added collections of new chants. The older manuscript types were distinguished not only by their repertory of chants, but by separate modal and melodic traditions and stock of characteristic melodic formulae.1