This paper presents an end-user interface that allows realtime parametric
control of sound events resulting in an interactive environment, in which
evolutionary computation is applied to algorithmic composition. The
resulting system, Vox Populi, uses genetic algorithms to generate and
evaluate a sequence of chords played as MIDI data. Harmonic, tonal and
voice range fitness are used to control musical features. Based on the
ordering of consonance of musical intervals, the notion of approximating
a sequence of notes to its harmonically compatible note or tonal centre
is used. This method employs fuzzy formalism and is posited as an
optimisation approach based on factors relevant to hearing music.