Changes

The Byzantine chant scale consists of seven notes: Νη, Πα, Βου, Γα, Δι, Κε, Ζω. These notes, together with the repeated Νη, cover a span of one octave. Within that octave, the relative pitch of each note varies according to the mode or tone of the scale. Current Byzantine chant theory divides the octave into 72 intervals (moria). The Western tone (whole-step) thus consists of 12 moria, with the semi-tone (half-step) consisting of 6. The position of the notes within the octave varies according to the mode (tone) in which a melody is chanted. Byzantine chant consists of eight basic modes, although several modes exhibit variations in the scale. The modes are grouped in three categories: natural, enharmonic, and chromatic. ===The natural modes=== These are numbered 1, 4, Plagal of the first (5), and Plagal of the fourth (8). The scale for these modes is very similar to the Western scale. The distances between notes is {||