# 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`