“UbuntuHelp:SurroundSound”的版本间的差异

2007年5月14日 (一) 11:00的版本

文章出处:

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

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Enabling Surround Sound in libraries

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"