Adding Expressiveness to Musical Messages

A system to add expressiveness to musical messages has been developed, starting from the results of acoustic and perceptual analyses. The system allows to obtain different performances, by modifying the acoustic parameters of a given neutral performance. The modification of the input performance is performed by a model that uses the hierarchical segmentation of the musical organization. For every hierarchical level, opportune curves are applied to the principal acoustic parameters. Level's self-similarity is the main criteria to construct the curves. The modular structure of the system defines an open architecture, where the rendering steps can be realized both with synthesis and post-processing techniques. Different synthesis techniques, like FM, physical models or wavetable have been explored