matlab 基本语音处理，可以实现基本音乐的输入，并做傅里叶变换进行频谱分析-matlab basic speech processing, can achieve basic music input, and to do Fourier transform spectrum analysis

A fast Fourier transform (FFT) is an algorithm to compute the discrete Fourier transform (DFT) and its inverse. A Fourier transform converts time (or space) to frequency and vice versa an FFT rapidly computes such transformations. As a result, fast F