“…Recently, as the rapid progress in digital representations of music data, how to efficiently manage music data is getting more attentions. There are more and more investigations increasingly attractive in retrieving the music collections such as the Query by Rhythm by Chen, et al [3], Query by Music Segments by Chen, et al [4], Multi-Feature Index Structures by Lee, et al [14] and Lo, et al [21] [22], NonTrivial Repeating Pattern Discovering for music data by Liu, et al [16] and Lo, et al [23], Melodic Matching Techniques by Uitdenbogerd, et al [30], Approximate Melody Matching by Liu, et al [17] [33], Key Melody Extraction and N-note Indexing by Tseng [29], Numeric Indexing for Music Data by Lo, et al [18] [19], and more in [1][10] [15] [18] [20][23] [26] [28].…”