这是我用STC89C58RD+单片机做的音频功率谱分析，包含FFT程序，对学习FFT软件滤波算法的朋友肯定会有所帮助的。-This is what I do with STC89C58RD+ single chip audio power spectrum analysis, including FFT program, the software filter algorithm for learning FFT friends would certainly have been helpful.