| Summary: | 碩士 === 國立交通大學 === 工學院聲音與音樂創意科技碩士學位學程 === 102 === This study aims to explore the complexity of chord progressions and its application to the automatic accompaniment system. Experiment was conducted to verify the harmony complexity by general public. To make a better accompaniment with melody, we use harmony complexity to control music accompaniment texture. In addition, we propose DCPA (Dual Chord Progressions Algorithm) automatic accompaniment system, which is divided into four parts: key finding, chord analysis, chord select algorithm, and pattern accompaniment system. To improve the versatility of system, we establish the rule of chord function to make the chord progressions comply with the rules. In pattern accompaniment system, users can add a variety of different patterns accompaniment, so that the automatic accompaniment sounds richer. Researchers can make more chord-select rules and patterns to coordinate specific music style in the future work.
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