ENRICO CHAPELA BARBA
COMPOSER
Antikythera
Symphony Orchestra
This work was commissioned by the Orquesta Filarmónica de Boca del Río, Mexico.
The Antikythera mechanism is an ancient mechanical device designed to calculate the position of the stars and planets in the sky. It was discovered beneath the remains of a shipwreck near the Greek island of Antikythera, and is believed to be over two thousand years old.
Based on a complex system of gears, this machine could reproduce the movements of the Sun, Moon and the five planets known at the time, using the zodiac calendar as a reference. The gears are made with such advanced technology that, before their marine rescue in 1900, this type of gearing was considered an invention of Renaissance watchmakers.
The calculations performed by the gears are the result of the difference between their teeth. For example, if a gear with 20 teeth carries one with 10 teeth, the shaft of the 20-tooth gear will rotate once, while the 10-tooth gear will rotate twice. Thus, by multiplying and dividing whole numbers, this extraordinary mechanism could, with a simple circular movement of its crank, govern the movement of several pointers arranged on its front side.
In musical terms, this machine is a sort of barrel organ that transforms a constant circular motion with a certain frequency into a multiplicity of frequencies. These frequencies, being obtained as a result of multiplying and dividing whole numbers, can be calculated with fractions, which allows to translate the same proportions into time signatures, intervals, harmonics and polyrhythms.
PERFORMANCES
World Premiere. Teatro Fernando Gutiérrez Barrios, Boca del Río, Veracruz, Mexico. Orquesta Filarmónica de Boca del Río, Jorge Mester, conductor.
November 04, 2016