UbuntuHelp:SurroundSound

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https://help.ubuntu.com/community/SurroundSound

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Enabling Surround Sound in libraries

By default, Ubuntu uses PulseAudio for its sound. Also by default, PulseAudio is set to 2 channels only. Enabling surround sound involves changing one line in the configuration file /etc/pulse/daemon.conf. In the terminal, type the following: sudo gedit /etc/pulse/daemon.conf This should open up the configuration file in gedit. Once open, scroll down to find the line ; default-sample-channels = 2. Remove the semicolon at the start of the line and change the line according to your surround sound configuration:

• For 2.0 channel sound: default-sample-channels = 2
• For 4.0 channel sound: default-sample-channels = 4
• For 5.0 channel sound: default-sample-channels = 5
• For 5.1 channel sound: default-sample-channels = 6
• For 7.1 channel sound: default-sample-channels = 8

Save the file the restart your computer. For more detailed information, check the following links: http://ubuntuforums.org/showthread.php?t=795525 http://www.automaticable.com/2008-05-28/how-to-enable-surround-sound-on-ubuntu-hardy/

Enabling Surround sound in ALSA

Surround may already be working, make sure alsamixer has the right volume settings (Wave Surround in particular). These commands should be useful for testing: For 4.0 surround (two speakers in front, two in the back): speaker-test -Dplug:surround40 -c4 -l1 -twav For 5.1: speaker-test -Dplug:surround51 -c6 -l1 -twav For 7.1: speaker-test -Dplug:surround71 -c8 -l1 -twav If it's not working, you might try following alsa's own guide: http://alsa.opensrc.org/SurroundSound And also this: http://www.halfgaar.net/surround-sound-in-linux Note however that many codecs require custom routing (ttables), the folk at #alsa on irc.freenode.org may be able to help in that case.

Enabling Surround Sound in OpenAL

Edit ~/.openalrc (or /etc/openalrc if you want the setting to apply system-wide) and add these two lines: `(define speaker-num 4)` `(define alsa-device "surround40")` Currently OpenAL does not seem to work with 5.1 or higher, but this should work fine.

Enabling Surround Sound in Specific Applications

xmms

Right-Click -> Options -> Preferences -> Audio I/O Plugins > Alsa > Configure Under "Audio Device" enter "plug:surround51"