to complete report : 
dpkg -l | egrep -e 'alsa|pulse'

ii  alsa-base                                      1.0.20+dfsg-1ubuntu5                       ALSA driver configuration files
ii  alsa-utils                                     1.0.20-2ubuntu6                            ALSA utilities
ii  bluez-alsa                                     4.51-0ubuntu2                              Bluetooth audio support
ii  gstreamer0.10-alsa                             0.10.25-2ubuntu1.2                         GStreamer plugin for ALSA
ii  gstreamer0.10-pulseaudio                       0.10.16-1ubuntu3                           GStreamer plugin for PulseAudio
ii  libcanberra-pulse                              0.15-0ubuntu7                              a simple abstract interface for playing even
ii  libesd-alsa0                                   0.2.41-5                                   Enlightened Sound Daemon (ALSA) - Shared lib
ii  libpulse-browse0                               1:0.9.19-0ubuntu4.1                        PulseAudio client libraries (zeroconf suppor
ii  libpulse-mainloop-glib0                        1:0.9.19-0ubuntu4.1                        PulseAudio client libraries (glib support)
ii  libpulse0                                      1:0.9.19-0ubuntu4.1                        PulseAudio client libraries
rc  libpulsecore9                                  1:0.9.14-0ubuntu20.2                       PulseAudio sound server core
rc  libsdl1.2debian-alsa                           1.2.13-4ubuntu3                            Simple DirectMedia Layer (with X11 and ALSA 
ii  libsdl1.2debian-pulseaudio                     1.2.13-4ubuntu4                            Simple DirectMedia Layer (with X11 and Pulse
ii  libsnack2-alsa                                 2.2.10-dfsg1-8ubuntu1                      Sound extension to Tcl/Tk and Python/Tkinter
ii  linux-backports-modules-alsa-2.6.31-18-generic 2.6.31-18.20                               Ubuntu supplied Linux modules for version 2.
ii  linux-backports-modules-alsa-karmic-generic    2.6.31.18.31                               Backported drivers for alsa-driver snapshot.
ii  pulseaudio                                     1:0.9.19-0ubuntu4.1                        PulseAudio sound server
ii  pulseaudio-esound-compat                       1:0.9.19-0ubuntu4.1                        PulseAudio ESD compatibility layer
ii  pulseaudio-module-bluetooth                    1:0.9.19-0ubuntu4.1                        Bluetooth module for PulseAudio sound server
ii  pulseaudio-module-gconf                        1:0.9.19-0ubuntu4.1                        GConf module for PulseAudio sound server
ii  pulseaudio-module-udev                         1:0.9.19-0ubuntu4.1                        udev device detection module for PulseAudio 
ii  pulseaudio-module-x11                          1:0.9.19-0ubuntu4.1                        X11 module for PulseAudio sound server
ii  pulseaudio-module-zeroconf                     1:0.9.19-0ubuntu4.1                        Zeroconf module for PulseAudio sound server
ii  pulseaudio-utils                               1:0.9.19-0ubuntu4.1                        Command line tools for the PulseAudio sound 
ii  vlc-plugin-pulse                               1.0.2-1ubuntu2.1                           PulseAudio plugin for VLC