Project: P/12

by Madalyn Merkey

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Project: P/12

This project is a study of sinusoidal sounds glissandi.
They cover a wide band of the frequency spectrum. We intend to obtain a certain number of glissandi exactly simultaneous, that all start from the same frequency; ascend to different maximum frequencies; then all descend back to the frequency of departure.
These glissandi are described with a Cartesian representation of the parabolas (Table VII). The family of parabolas contain the equation of passing through two fixed points (0, 370) and (60, 370), with all vertices on the line where t = 30 seconds.
The equation is as follows:

y = -(K2/900) • x2 +(K2/15) * x+370 y=Hz
x= t

Given this equation, the variation of the parameter K can obtain endless parables to satisfy the initial conditions. Twelve states have been chosen between 470 Hz and 14,770 Hz to maximize distribution of harmony in the total sound, i.e. to apply values already at the superior sound threshold of human audibility.

Each glissando is indicated by the value of parameter K which determines its maximum Hz.

lyrics

370 Hz to K to 370 Hz

credits

released November 14, 2017
Project: P/12 by Enore Zaffiri
Computer version by Madalyn Merkey

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Madalyn Merkey Oakland, California

In 2015, Merkey translated the pioneer electronic music text, Due scuole di musica elettronica in Italia (1968) by composer Enore Zaffiri (b. Turin, 1928), from Italian to English.

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