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Heortology also relies on the science of history to understand the origin and evolution of rituals. A festival is generally a re-enactment of a solemn, legendary or real act. Thus, ancient civilizations commemorate as the victory of a hero over a serpent-god, or the betrothal of the Earth to the Sun while for Christians, Easter is the solemn ...
The names ascribed to the eight tones differ in translations into Church Slavonic.The Slavonic system counted the plagioi echoi as glasa 5, 6, 7, and 8. For reference, these differences are shown here together with the Ancient Greek names of the octave species according to the Hagiopolites [2] (see Hagiopolitan Octoechos) and to the chant treatises and tonaries of Carolingian theorists.
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Octave" has two senses in Christian liturgical usage. In the first sense, it is the eighth day after a feast, counted inclusively , and so always falls on the same day of the week as the feast itself.
Ray of Creation. The Ray of Creation is an esoteric cosmology which was taught by G. I. Gurdjieff as part of his Fourth Way teaching. It is a diagram which better represents the place which Earth occupies in the Universe.
The musical system of ancient Greece evolved over a period of more than 500 years from simple scales of tetrachords, or divisions of the perfect fourth, into several complex systems encompassing tetrachords and octaves, as well as octave scales divided into seven to thirteen intervals.
In music, an octave (Latin: octavus: eighth) or perfect octave (sometimes called the diapason) [2] is an interval between two notes, one having twice the frequency of vibration of the other. The octave relationship is a natural phenomenon that has been referred to as the "basic miracle of music", the use of which is "common in most musical ...
In electronics, an octave (symbol: oct) is a logarithmic unit for ratios between frequencies, with one octave corresponding to a doubling of frequency. For example, the frequency one octave above 40 Hz is 80 Hz. The term is derived from the Western musical scale where an octave is a doubling in frequency.