Spectral Tools for Dynamic Tonality and Audio Morphing
William A. Sethares, Andrew J. Milne, Stefan Tiedje, Anthony Prechtl, James Plamondon · Computer Music Journal · 2009
The Spectral Toolbox is a suite of analysis–resynthesis programs that locate relevant partials of a sound and allow them to be resynthesized at specified frequencies. This enables a variety of routines including spectral mappings (changing all partials of a source sound to fixed destination frequencies), spectral morphing (continuously interpolating between the partials of a source sound and those of a destination sound), and what we call Dynamic Tonality (a novel way of organizing the relationship between a family of tunings and a set of related spectra). A complete application called the TransFormSynth provides a concrete implementation of Dynamic Tonality.