基于回声隐藏的信息隐藏算法，是一种音频信号的水印技术，包括隐藏信息的嵌入和提取，以及对于噪声，MP3压缩，滤波，重采样和延迟攻击的模拟。-Based on echo hiding information hiding algorithm, is an audio signal watermarking techniques, including embedding and extracting hidden information, as well as for noise, MP3 compr

STM32 all the information produced by the MP3, Matlab to achieve user-friendly, LM386 audio signal amplification.