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The Advanced Linux Sound Architecture (ALSA) project developers have released a new version, 1.0.22. This new version brings fixes for the Creative X-FI cards whose support has been introduced this year, some more work on CMI8788 Oxygen APU and many improvements to the HDA codec and driver (both generic and Intel).



Also, The upmix audio plugin now supports 7.1. For more details, see the CHANGELOG.

[via ossblog.it]


You can already upgrade to ALSA 1.0.22 in Ubuntu, by using the ALSA upgrade script and changing this part of the script:

alsa1021 () {
DRIVER=alsa-driver-1.0.21
FIRMWARE=alsa-firmware-1.0.20
LIB=alsa-lib-1.0.21a
PLUGINS=alsa-plugins-1.0.21
UTILS=alsa-utils-1.0.21
TOOLS=alsa-tools-1.0.21
OSS=alsa-oss-1.0.17
}


With this:

alsa1021 () {
DRIVER=alsa-driver-1.0.22
FIRMWARE=alsa-firmware-1.0.20
LIB=alsa-lib-1.0.22
PLUGINS=alsa-plugins-1.0.22
UTILS=alsa-utils-1.0.22
TOOLS=alsa-tools-1.0.22
OSS=alsa-oss-1.0.17
}


You should only upgrade if you have issues with your sound!

Update: there is now also a PPA which you can use to upgrade to ALSA 1.0.22 in Ubuntu Karmic.
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