In the most of current works, the researchers extract the features, such as melodies, rhythms and chords, from the music data and develop indices that will help to retrieve the relevant music quickly.

• 现在大部分的研究工作，多利用音乐资料的特性萃取，例如：旋律、节拍、合弦等等，来建立索引，以加速音乐资料的搜寻。