The disposition of the eight modes (main and medial signatures) of the Byzantine Octoechos and their basis tones in the diapason system, according to Chrysanthos of Madytos and the New Method (Neume Notation since 1814).
<a href="//commons.wikimedia.org/wiki/User:Platonykiss" title="User:Platonykiss">Platonykiss</a> (annotation)
2012-09-06
<a href="https://en.wikipedia.org/wiki/Chrysanthos_of_Madytos" class="extiw" title="en:Chrysanthos of Madytos">Chrysanthos</a>. 1832. Θεωρητικὸν μεγὰ τῆς Μουσικῆς. Triest, Michele Weis, 168.