说明：  AT89C51SND1具有以下功能： *MP3硬件解码器 -单独的MP3解码器 -支持48，44.1, 32, 24, 22.05, 16KHz采样频率 -左右声道独立的音量控制(软件使用31级) -重低音、中音、高音均衡控制(31级) -重低环绕声效果 -辅助数据输出 -“CRC错误”和“MPEG帧同步”指示
(AT89C51SND1 has the following functions :* MP3 decoder hardware-alone MP3 decoder-support 48, 44.1, 32, 24, 22.05, 16KHz sampling frequency-independent channel around the volume control (software 31)- bass, tenor, Treble balance control (31)- weight Surround Sound effect of low-output auxiliary data- "CRC error" and "MPEG frame synchronization "instructions)