Test ALSA audio working

How to get the audio working on your Raspberry PI?

You have to install three packages:

  • The ALSA utilities:
    sudo apt-get install alsa-utils
  • MP3 tools:
    sudo apt-get install mpg321
  • WAV to MP3 conversion tool:
    sudo apt-get install lame

Load the sound driver:

  • sudo modprobe snd-bcm2835

To check if the driver is loaded you can type:

  • sudo lsmod | grep 2835

Select the output device for sound (0=auto, 1=analog, 2=HDMI):

  • sudo amixer cset numid=2

Test the installation:

  • aplay /usr/share/sounds/alsa/Front_Center.wav
  • speaker-test -t sine -f 440 -c 2 -s 1
  • mpg321 “Mannish Boy.mp3”

It you get the following error message:

  • ALSA lib pcm.c:2217:(snd_pcm_open_noupdate) Unknown PCM cards.pcm.front

Edit the file /usr/share/alsa/alsa.conf:

  • sudo nano /usr/share/alsa/alsa.conf
  • change the line “pcm.front cards.pcm.front” to “pcm.front cards.pcm.default”

If you are using HDMI and cannot hear any audio at all change the following PI configuration setting:

  • edit the RasPI configuration file:
    sudo nano /boot/config.txt
  • uncomment the line:
  • save the file and reboot the PI



Raspberry PI – getting audio working