1，基于8051单片机 2，外接AUX In ，切换音源1，2，3 3，控制音量大小，高音，低音 4，其他系统寄存器的设置-1, based on 8051 2, external AUX In, switch audio 1,2,3 3, volume control, treble, bass 4, other system registers is set

使用使stm32f030控制pcm3070实现对音频信号的处理，此程序简单的实现了对volume，treble和bass的调整。-Use realization pcm3070 stm32f030 control of the audio signal processing, the program simple implementation of volume, treble and bass adjustment.

arduino音乐1 2 3 4 5 6 7的数字代码 低音C:131,147,165,175,196,221,248 中央C:262,294,330,350,393,441,495 高音C:525,589,661,700,786,882,990(Arduino music 1234567 digital code Bass C:131 147 165 175 196 221 248 Central C:262 294 330 350 393 441 495