键盘和声学的CAT系统设计与实现

摘要

通过对MIDI数据格式的研究，使用多媒体技术，实现了具有人机交互功能，能够模拟教师对学习者进行学习评价和指导的键盘和声学计算机辅助测试训练CAT系统.文中着重讨论了该CAT系统对MIDI信号的采样与和弦信号的处理技术，并给出了对学习者所弹奏和弦的评价顶层算法.%In this paper,the author discussed the data format of MIDI,anddeveloped an interactive keyboard harmony CAT system through multimedia technology.The CAT system can imitate the tutor to evaluate and instruct the learner in keyboard's training.We also discussed the method of sampling MIDI signals and the disposal of harmony signal,then gave an overall algorithm on evaluating the learner's playing.