中文说明：资源描述 1）读入给定的CEG和弦音音频信号（CEG.wav），对其进行离散傅立叶变换，分析信号频谱。给出信号的时域及频域波形。 2）分析CEG和弦音信号的频谱特点，对该信号频谱能量相对较为集中的频带（分低、中、高频）进行滤波（分别使用低通，带通及高通），分离出三个能量最集中的频带，画出滤波后信号的时域和频域波形，并对滤波后的信号与原信号的音频进行声音回放比较。 3）任意选择几个滤出的频带进行信号重建（合成），与原信号的音频进行声音回放比较
English Description：
Application background1) to read a given CEG (CEG.wav), the discrete Fu Liye transform, the analysis of the signal spectrum. Time domain and frequency domain waveforms are given.2) analysis of the spectrum characteristics of CEG chord tone signal, the frequency spectrum of the signal frequency band (sub low, medium and high frequency) of the filter (low pass, band pass and high pass), separated the three energy band, draw a filtered signal in time domain and frequency domain waveform, and the filtered signal with the original signal audio playback.3) arbitrary selection of a number of filter out of the frequency band signal reconstruction (synthesis), and the original signal of audio playback comparison