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"Aulos": An RTcmix interfaced software application for modeling cylindrical pipes with tone holes, with emphasis on the simulation of the ancient Greek Auloi

The necessities of a research project on an ancient Greek cylindrical bore wind instrument called "aulos" (pl. auloi) led to the development of the homonymous software application. Using as input data all the geometrical dimensions of a finite cylindrical pipe bearing tone holes, Aulos performs acoustical analysis and modeling of ancient or modern relevant instruments, sound synthesis, and extraction of musical information. The application is written in C and is available on Linux and Irix/SGI platforms. It includes algorithms for sequence generation of simple or fork-fingerings, calculations of the input impedance curve for each fingering, sweeping of acoustical variables, as well as a method for quick and accurate focusing on curve maxima and an algorithm that calculates pipe length and tone hole position, that give a desirable scale on a specific tonality. Aulos can also be used in cooperation with the RTcmix language for real-time sound generation, and Gnuplot for rapid graphical representation of output curves.