Discovering Hidden Themes in Symbolic Music Text

The algorithm proposed in this article, in order to identify the ("concealed") motif hidden among the notes of a musical composition represents, a revision of a previous algorithm (by Michele Della Ventura), based on the concept of "structural similarity": the motif, though being hidden among melodic figurations, maintained the rhythmic and melodic structure unaltered (even if it was subjected to transposition). The current algorithm dealt with the issue of identifying the melody hidden among the melodic figurations which change its structural characteristics, thus making its identification very complex. The comparison between a melodic segment and the melody taken as a "model" will be made by constructing the Trellis Diagram. The new algorithm works out correctly even in case of analysis of the same set of scores analyzed by the previous algorithm.