PCM Audio Out

To enable the PCM audio output add the below lines to /boot/config.txt

# Enable audio (loads snd_bcm2835 in OS)

You may find you can improve the audio quality by adding the below line in addition to the above :


if you then run the below command from the comand line this will run a basic test on the output

# amixer sset "PCM" 95%
# speaker-test


Note that the PCM output audio requires additional amplication to drive anything other than a basic set of headphones


The below links are useful as a reference :





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