基于MATLAB乐器校音系统的设计样本

****** 本 科 毕 业 设 计( 论 文) 乐器校音方法的讨论学 院( 系) : 信息与通信工程学院 专 业: 电子信息工程 学 生 姓 名: 学 号: 指 导 教 师: 评 阅 教 师: 完 成 日 期: 6 月 10 日 摘 要乐器校音对一般人而言是一项难以胜任的工作, 而现有的校音设备又存在着诸多弊端。开发一种操作简单, 价位适中, 误差率小的乐器校音软件已成为 21 世纪电脑音乐时代的要求。本文简要介绍了钢琴调律的基础知识、 以及运用 MATLAB 语言对声音信号进行分析的过程。利用基于傅里叶变换的谐波峰值法检测基频。经过分析, 提高基频的检测精度, 结合音律确定声音的调整方向。经过MATLAB 仿真结果表明, 运用此方法可达到的 5 高频精度较好, 而高频精度相对较差。乐器校音系统的设计很好地综合了音乐和技术领域的知识, 初步实现了机器检测音律的功能。随着科学技术的不断进展, 运用多媒体技术校音的手法必将成为乐器校音的主流。关键字: 乐器校音; 谐波峰值法; 频率校正; 音律The Method Of Tuning Musical Instrument TuningAbstractMusical Instruments Tuning For most people it is very difficult, and existing equipment of tuning device has many malpractice. So develop a simple, affordable, small error rate software of instrument tuning is the requirements of computer music times in 21st century.This paper introduces the basics of piano tuning and the process of using MATLAB to analysis the sound signals. And using the method of harmonic peak algorithm based on FFT to detection the fundamental frequency. By analyzing , increase the detection accuracy of baseband, combined with temperament determine the direction of the sound adjustment. MATLAB simulation results show that this method can make the accuracy batter for low frequency but high frequency is poor.Instrument tuning system combines the knowledge of music and technology. The initial realization of the function of machine detect the temperament. With the continuous development of science and technolo...