Concatenative Audio Music Re-composition
Date Issued
2015
Date
2015
Author(s)
Lin, Yin-Tzu
Abstract
In this dissertation, systematic techniques have been developed for helping users to make new music by concatenating existing audio materials, i.e. concatenative audio music re-composition. The re-composed music can be used as the background music for personal films and slideshows or for non-stop dance suites. Based on the content analysis techniques, music theory, and psychoacoustics, various composition and selection schemes have studied in detail. We could locate appropriate connecting positions on the basis of similarity values, phrase boundaries or bar information. Besides, psychoacoustics-based tempo adjustment methods are used to smooth the tempo of concatenated music pieces. For cases of distinct tempo or volume, effective dual tempo adjustment and volume normalization schemes have been proposed and investigated, respectively. Two different schemes are proposed for selecting materials from music collections: The straightforward scheme filtered out unfitting clips by pair wise comparison and ordered the clips by similarity values at the found connecting points. The graph-assisted scheme, first, constructed a musical dice graph from pre-processed clips based on the results of music signal analyses. Then, with the graph, we can provide personalized medley creation service, which will generate various pleasing medleys conform to the specified conditions, such as the medley structure or must-use clips. We also provide an GUI for the users to choose music clips, specify parameters and adjust concatenation boundaries. Experiment results showed the effectiveness of individual components, comparisons among methods, and provide guidelines for users to choose parameters.
Subjects
music editing
concatenating music
musical medley
Type
thesis
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