Synthesis of Expression

In the composition context, real time is not an issue instead creative ideas are seduced by various degrees of freedom and parameters in the Physical Model algorithm. Although a traditional representation of the acoustical instrument is highly desirable, a non conventional behavior gives new fresh possibilities impossible in the real world by morphing the traditional sound of the instrument into different wave shapes or variations [5, Smith, 1996]. In order to obtain this desired control over the rendering of a composition, all of the expressive parameters need to be computed a priory therefor providing a score file which is later combined with the synthesis of the modeled acoustics of the sound. These parameters can be computed manually or automatic by means of envelopes, functions or algorithms. Several applications of automatic parameter manipulation by mathematical functions in the fields of Randomness, Chaos, Markov Models, Bayesian Nets and Neural Nets provide a high degree of variety for musical expressiveness.