Have you like many others upgraded Ubuntu previously using only ALSA, now forced to deal with PulseAudio? Or perhaps you've jumped in fresh. Nevertheless, while doing my usual gaming after enabling PulseAudio I noticed both subtle and major distortion. I can't game with this non-sense and proceeded to Google for someone elses method so I didn't have to think it up myself. None worked for me, so I did the first thing that came to mind. As a lazy script loving fool, I did the following:

sudo apt-get remove PulseAudio

Then proceeded to the Alsa Upgrade Script. Run this script, reboot and should have only ALSA working perfectly and no PulseAudio. Unfortunately your little taskbar sound icon will be gone, but I'm sure you could figure out how to replace. I just put an icon on my desktop for AlsaMixer, which is:

gnome-alsamixer

ALSA v1.0.21 Upgrade Script

Enjoy

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