FFT的详细原理分析，且基于DSP处理器的详细C实现算法。值得学习。-Detailed schematic of the FFT analysis, and algorithm based on DSP processor C. Worth learning.

PIC12f54单片机控制的专用的回音消除程序。如果需要模块的PCB和原理图请和我联系。-PIC12f54 dedicated MCU control echo cancellation procedures. If the module PCB and schematic please contact me.