Title17 Tones
Publication TypeConference Paper
Year of Publication1992
AuthorsHajdu, G
Conference NameInternational Computer Music Conference
PublisherInternational Computer Music Association
Conference LocationSan Jose, CA

The aim of our project was to encourage composers to create pieces that were suitable for two mechanical pianos (occasionally with some additional instruments). The Cologne Hochschule fur Musik provided the pianos for a semester in 1988, giving us the opportunity to experiment with this tuning. Microtonal music played an important role in Johannes Fritschs seminar at the Cologne Hochschule fur Musik. His preoccupation with universal harmony was supported by Clarence Barlows theory of quantized harmony (Barlow 1987). Departing from Barlow's treatise I started to develop my own theory of harmonic energy, based on harmonic consonance and pitch strengtha unifying notion for internal (physiological and psychological) and external (physical) factors affecting pitch perception (Hajdu 1992b). The stability of a musical system can be calculated by combining harmonic energy values for each element of its interval set. In order to compare different systems, and to thereby determine their relevance, the differences between the combinatorial energy for each system and the average combinatorial energy are scaled so that the most negative result corresponds to 10, and the most positive to 0.