Armenian Khazs
Armenian khazs are a national system of medieval musical notation used to record and transmit melodies of spiritual, ceremonial, and folk music. This system was formed after the invention of the Armenian alphabet in the 5th century and reached its peak in the 10th to 12th centuries, perfectly expressing the phonetic and accentual features of the Armenian language. Structurally, khazs are special signs written above the lines of the text, sometimes also between the lines. Unlike modern five-line notation, khazs did not indicate the absolute pitch of the sound but pointed to the course of the melody, the direction of movement, duration, timbre, accent, and other nuances of performance. There were more than forty main signs and numerous auxiliary signs, each with its own name (for example, sharp, knee, closed, return). The peak of the development of khazs is associated with the name of the 12th-century musician Khachatur Taronatsi, who reformed and systematized the art of khaz notation by creating the "Khazgirk". Starting from the 14th century, due to severe historical and political conditions, the loss of statehood, and the destruction of cultural centers, the use of khazs gradually declined. In the 17th and 18th centuries, practical knowledge of the system was almost completely lost, and the rich medieval khaz manuscripts became unreadable. In the early 19th century, Armenian musicologist Hambardzum Limonyan created a new system of Armenian notation, which, although based on t