基于MATLAB的音乐旋律二维可视化方法

A method for two dimension visualization of music melody based on MATLAB

音频可视化是信息可视化的重要分支,音乐是最具大众性和普遍性的音频信息,乐谱描述音乐的特点是专业性强,形式抽象。为了有利于音乐的展示,提出将音乐进行二维图形映射的可视化处理方法。旋律是音乐的基本要素,主要包含音高、时值和响度等特征,将音乐的旋律进行数据化,绘制二维图形,可以增强人们对音乐的感觉和认知。音频数据受到采样频率和分割帧的影响,会产生大量的过程性数据。MATLAB提供音频处理函数和大规模数据的分布式并行处理功能,可以完成音乐旋律二维可视化的实时处理。利用傅里叶变换提取音乐旋律的基本特征,形成音高、时值和响度等音乐特征向量矩阵,编制程序完成旋律二维可视化图形的自动绘制。

Audio visualization is an important branch of information visualization,Music is the most popular and universal audio information, Music score is characterized by strong professionalism and abstract form for describing music.In order to be good for the display of music,proposed a visual processing method for mapping two dimensional graphics of music,melody is the basic element of music,mainly contains the characteristics of pitch,time value,and loudness.Maked data of the melody of the music,drawed two-dimensional graph,it can enhance people＇s feeling and perception of music.Audio data are affected by the frequency of sampling and the splitting frame,a lot of process data will be generated,MATLAB provides audio processing functions and distributed parallel processing function for large-scale data,completed real-time processing of two dimension visualization of music melody.Extracted basic characteristics of music melody by Fourier transform,formed musical feature vector matrix,such as pitch,duration,and loudness,programmed for automatic drawing of two dimension visualization of melody.