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I got some issues with sound, sometimes it freezes and get out of sync with picture. VLC is giving me error, and there is said that I should update to pulseaudio 3.0. I'm running Ubuntu 12.10 and pulseaudio is

$ pulseaudio --version
pulseaudio 2.1

Shall I upgrade? And if so, how?

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You can install pulseaudio 2.0 from the ubuntu-audio-dev ppa:

sudo add-apt-repository ppa:ubuntu-audio-dev
sudo apt-get update
sudo apt-get upgrade
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up vote 2 down vote accepted

With upgrade to 13.04 pulseaudio updated to version 3.0 and problems disappeared.

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