add Volume indicator for xUbuntu 16.04 LTS

Running xUbuntu 16.04 LTS on VMware.

I am a less is better person, so did no have sound card at begining.

After add sound card, found there is no Volume indicator on Panel as an option.

I am using pulseaudio server for sound in xUbuntu.

apt-get install xfce4-pulseaudio-plugin

Logout then Login.

Now you can add the Volume indicator on the Panel.