http://howto.blbosti.com/2010/03/ubuntu-server-install-alsa-sound-and-moc-music-on-console/

- Install the ALSA sound driver

sudo apt-get install alsa alsa-tools
sudo adduser yourusername audio
#reboot
alsamixer

- Install pulseaudio sound server to act as middleware and configure
https://wiki.archlinux.org/index.php/PulseAudio

sudo apt-get install pulseaudio pulseaudio-alsa pulseaudio-bluetooth pulseaudio-equalizer pulseaudio-jack #pulseaudio-lirc pulseaudio-zeroconf

- Install multimedia framework "gstreamer"
https://wiki.ubuntuusers.de/GStreamer/

sudo apt-get install libgstreamer1.0-0 gstreamer1.0-plugins-base gstreamer1.0-plugins-good gstreamer1.0-libav gstreamer1.0-doc gstreamer1.0-tools gstreamer1.0-x gstreamer1.0-alsa gstreamer1.0-gl gstreamer1.0-gtk3 gstreamer1.0-qt5 gstreamer1.0-pulseaudio
#gstreamer1.0-plugins-bad gstreamer1.0-plugins-ugly

- PulseAudio UI:
https://wiki.ubuntuusers.de/pavucontrol/

sudo apt-get install pavucontrol 

- Sound Mixer
sudo apt-get install kmix

#Then configure "Global shortcuts" for kmix for the media buttons to work

#Under KDE this can be done 
#by going to "System Settings" -> "Global Shortcuts" -> "Kmix" 
#and adding missing shortcuts by "Add custom shortcut" and operating the media buttons