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Even in the same time period, such as in the 2010s, different styles of music and different cultures use different music notation methods; for example, for professional classical music performers, sheet music using staves and noteheads is the most common way of notating music, but for professional country music session musicians, the Nashville Number System is the main method.
Sometimes cantors also use transcriptions into Western or Kievan staff notation while adding non-notatable embellishment material from memory and "sliding" into the natural scales from experience, but even concerning modern neume editions since the reform of Chrysanthos a lot of details are only known from an oral tradition related to traditional masters and their experience.Ancient Greek notation appears to have fallen out of use around the time of the Decline of the Roman Empire.Byzantine music has mainly survived as music for court ceremonies, including vocal religious music.Chrysanthos' Kanonion with a comparison between Ancient Greek tetraphonia (column 1), Western Solfeggio, the Papadic Parallage (ascending: column 3 and 4; descending: column 5 and 6) according to the trochos system, and his heptaphonic parallage according to the New Method (syllables in the fore-last and martyriai in the last column) (1832, p.33)ē, ké, zō, nē, while the older practice still used the four enechemata or intonation formulas of the four echoi given by the modal signatures, the authentic or "kyrioi" in ascending direction, and the plagal or "plagioi" in descending direction (Papadic Octoechos).
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they indicate pitch steps (rising, falling or at the same step), and the musicians know to deduce correctly, from the score and the note they are singing presently, which correct interval is meant.