Banana Pi M1 (BPI-M1) 音频接口

Banana pi BPI-M1 support two audio device HDMI and headphone

Banana Pi M1 支持2个音频输出接口，1个是HDMI接口另一个是3.5mm模拟音频输出接口

• 如何选择HDMI接口或者3.5mm接口作为默认的音频输出接口：

  sudo nano /etc/asound.conf```

  pcm.!default { type hw card 0 //If you want to set HDMI as output ,turn 0 to 1. device 0 } ctl.!default { type hw card 0 //If you want to set HDMI as output ,turn 0 to 1. } ```

• 插入3.5mm耳机 speaker-test -twav -c2

• The sound "sound left，sound right，sound left" will output from headphone. sudo apt-get install espeak espeak "hello" //say: hello espeak "hello_bananapi" //say: hello banana pi

• 运行音量编辑器： sudo alsamixer