Digital Music Score Design And Implementation Of Several Key Technologies

Furtherly study of the existing Digital Music Score, and combine them with theirusing object, four functions of Digital Music Score-display function, play function,learning function and music management functions were designed. In this article thekey technologies, for instance extract music information from the MIDI file, musicintegrate and display, music detection identification, music traction and etc. werestudied. The following work were mainly done.The structure of MIDI file and the expression form of the MIDI file for the musicinformation were introduced and studied.Consulted literatures that relate to MIDI，andanalysed the structure of a large number of MIDI files,we found that the MIDI files usenormaltive and quantitative form to indicate the musical notes.The strength,length oftime value,timbre and other information of the musical notes can be obtiained by MIDIfiles analysis.The normalnation of the MIDI files for the musical notes information is soparticularity that the note information was scattered,and the expression form of themusical notes that translated directly form Digital Music Score was so tedious,what’smore,the expression form has tremendous differents from the common music score.Inorder to make the digital music score as similar as possible to common music score,weintergrated the some consecutive musical notes that have the same value in the samesection,the music scores were more pithy and more convenience to users to grasp thetime value after integrated.Compare and analysis several commonly used time-frequency analysis tools,according to the requirements of the music instrument’s keynote detection identification,the short-time Fourier transform was chose to play as the keynote extraction tool. Basedon the extraction of the keynote,, compared keynote frequency to the standard frequency,the identification of musical note and assistant turning of piano were achieved.The automatically flip over of the Digital Music Score is based on the accurateorientation of the musical notes, that is Digital Music Score tracking. Analysed theadvantages and disadvantages of the Dannenberg and Pardo algorithm, notes matchingand search range limiting were proposed to improve the efficiency and fault-tolerantrate of the music tracking.