采用C语言编写的MP3解码程序，可以移植到STM32等MCU，移植比较简单-mp3 audio file decoder source code,can use to a stm32 mcu

在github上下载的回声消除程序，有文档和代码，代码有MATLAB的和stm32的，可以借鉴参考下-Refer to the following on github download echo cancellation procedures, documentation and code, the code has MATLAB and stm32 can learn