Quite often, there is a delay between latest stable application version from an upstream project and updated version from the Ubuntu repositories. This gap is quite important with ALSA. Here is a tutorial from soundcheck that will help you install the latest official stable ALSA release: “ALSA Upgrade Script“. The script should be used with caution as it installs packages itself without going through official repositories. A restore option is provided to reinstall sensitive packages and get them back to their previous Ubuntu version. Many sound issues appear to be solved by this tutorial! Sound should be treated like video via restricted hardware..