This study analyzes the limitsof existing methods and the reasons for their low efficiency,implements the technique to represent humming and homophonic music as feature-sequences. It proposes a new content-based Homophonic Music RetrievalModel(HMRM).

• 分析了现有方法应用范围局限性和低效率的原因；讨论了用户哼唱和多声道midi特征序列的表达方法；提出新的基于内容的多声道MI-DI检索模型HMRM(Homophonic midi Retrieval Model).