Raspberry Pi Audio
Currently, the audio drivers for the Raspberry Pi are still in beta, and as such come disabled in the standard release (debian6-19-04-2012.zip). Here’s a quick way to get it up and running for both the HDMI as well as the analog output. Open up a terminal and install the alsa (Advanced Linux Sound Architecture) utility package:
sudo apt-get install alsa-utils
Now load the sound driver using modprobe:
sudo modprobe snd_bcm2835
By default output will be automatic (HDMI if supported, else analog). You can force it to use a specific interface with:
sudo amixer cset numid=3
Substituting <n> for the desired mode: 0=auto, 1=headphones, 2=hdmi. For example, to force the Raspberry Pi to use the analog output:
sudo amixer cset numid=3 1
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