diff --git a/modules/config/pulseaudio.nix b/modules/config/pulseaudio.nix
new file mode 100644
index 00000000000..55270c29037
--- /dev/null
+++ b/modules/config/pulseaudio.nix
@@ -0,0 +1,47 @@
+{ config, pkgs, ... }:
+
+with pkgs.lib;
+
+{
+
+  options = {
+  
+    hardware.pulseaudio.enable = mkOption {
+      default = false;
+      description = ''
+        Whether to enable the PulseAudio sound server.
+      '';
+    };
+
+  };
+  
+
+  config = mkIf config.hardware.pulseaudio.enable {
+
+    environment.systemPackages =
+      [ pkgs.pulseaudio pkgs.alsaPlugins ];
+
+    environment.etc =
+      [ # Write an /etc/asound.conf that causes all ALSA applications to
+        # be re-routed to the PulseAudio server through ALSA's Pulse
+        # plugin.
+        { target = "asound.conf";
+          source = pkgs.writeText "asound.conf"
+            ''
+              pcm.!default {
+                type pulse
+                hint.description "Default Audio Device (via PulseAudio)"
+              }
+              ctl.!default {
+                type pulse
+              }
+            '';
+        }
+      ];
+
+    # Ensure that the ALSA Pulse plugin appears in ALSA's search path.
+    environment.pathsToLink = [ "lib/alsa-lib" ];
+
+  };
+
+}
diff --git a/modules/module-list.nix b/modules/module-list.nix
index d7fc7e2ec87..c2c8d4ee7ab 100644
--- a/modules/module-list.nix
+++ b/modules/module-list.nix
@@ -7,6 +7,7 @@
   ./config/no-x-libs.nix
   ./config/nsswitch.nix
   ./config/power-management.nix
+  ./config/pulseaudio.nix
   ./config/shells.nix
   ./config/swap.nix
   ./config/system-path.nix
diff --git a/modules/services/x11/desktop-managers/kde4.nix b/modules/services/x11/desktop-managers/kde4.nix
index 9cfbee8ecc7..5b68114135a 100644
--- a/modules/services/x11/desktop-managers/kde4.nix
+++ b/modules/services/x11/desktop-managers/kde4.nix
@@ -117,6 +117,11 @@ in
           # Phonon backends.
           pkgs.kde4.phonon_backend_gstreamer
           pkgs.gst_all.gstPluginsBase
+          pkgs.gst_all.gstPluginsGood
+          pkgs.gst_all.gstPluginsUgly
+          pkgs.gst_all.gstPluginsBad
+          pkgs.gst_all.gstFfmpeg # for mp3 playback
+          pkgs.gst_all.gstreamer # needed?
 
           # Miscellaneous runtime dependencies.
           pkgs.kde4.qt4 # needed for qdbus
@@ -138,6 +143,8 @@ in
     services.hal = mkIf (!isKDE47) { enable = true; };
     services.udisks = mkIf isKDE47 { enable = true; };
     services.upower = mkIf isKDE47 { enable = true; };
+
+    hardware.pulseaudio = mkIf isKDE47 { enable = true; };
     
   };