Multimedia->PulseAudio Volume Control(pavucontrol) :)
yum info xfce4-volumed … : The volume level is shown in a notification. ;)
yum info xfce4-notifyd
and yum info xfce4-mixer :)
Panel-> Add New Items… Audio Mixer Playback: …(PulseAudio Mixer)
And yes, all this works very nicely. :) It is important to note once again: PulseAudio. ;)
poma