If you are experiencing the problem of not being able to set your sound as loud as you may have in previous releases here is the fix as described in bug 498747:
$ su -c 'yum install alsa-utils; alsamixer -c 0'
Escape exits the
You will be shown a number of different sliders in a text based interface. I moved all of them up and down until I found the offender. This problem is described in the Fedora 11 Releases Notes and common bugs page, but not exactly how to fix it. For some reason I don’t have an application called Advanced Volume Control in my System/Preferences menu as suggested in the release notes, but maybe that is because I upgraded from Fedora 10.