Byzantine Music In Theory And Practice - (pdf) - ...
"Byzantine Music in Theory and Practice" by Prof. Savas I. Savas is a foundational 1965 text detailing the 1,500-year-old Greek-Orthodox monophonic chant tradition. The work outlines the liturgical Octoechos system, neume notation, and rhythmic classifications (Heirmologic, Sticheraric, and Papadic) that define the genre. Read the text in full at byzantinechant.org . BYZANTINE MUSIC in Theory and Practice (PDF)