Armenian music manuscript with khaz neumes, 12th century (Matenadaran)

Khaz (Armenian: խազ) is an Armenian neume, one of a set of special signs (plural: khaz or khazes) constituting the traditional system of musical notation that has been used to transcribe religious Armenian music since the 8th century.^[1][2]

• Examples of khaz signs
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References

Wikimedia Commons has media related to Khazes.