Even though the research within Music Information Retrieval domain is well-advanced, searching for music is still under development. Thanks to melody search methods applied in 'query by humming' systems, users can retrieve melodies on the basis of an audio input. However, the research on rhythm is not advanced to such an extent yet. This paper addresses automatic retrieval of rhythmic patterns based on symbolic representation of music employing repeating rhythmic and melodic patterns. In the experiments the importance of melorhythmic representation of a musical piece is verified and compared to the sound duration-based hypothesis ranking method. Since most of musical files to be found in the Internet are polyphonic the lowest or the highest sounds of the chords are also taken into consideration.
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