Automatic Extraction of Approximate Repetitions in Polyphonic Midi Files Based on Perceptive Criteria

摘要: In the context of musical analysis, we propose an algorithm that automatically induces patterns from polyphonies. We define as “perceptible repetitions in a piece”. The measures relies on some general perceptive notions: it is non-linear, non-symetric and non-transitive. model can analyse any music genre contains beat. analysis performed into three stages. First, quantize MIDI sequence segment “beat segments”. Then, compute similarity matrix segmented sequence. measure features such rhythm, contour pitch intervals. Last, bottom-up approach proposed for extracting matrix. was tested several pieces music, examples will be presented this paper.