BPI-M1 Audio

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

• How to choose HDMI or headphone for audio output

  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.
  }

• Plug in the headphone and type

  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

• Run the sound volume controler,you can see

  sudo alsamixer