diff --git a/mopidy/mixers/gstreamer_software.py b/mopidy/mixers/gstreamer_software.py
index 1225cafd..333690ea 100644
--- a/mopidy/mixers/gstreamer_software.py
+++ b/mopidy/mixers/gstreamer_software.py
@@ -1,7 +1,4 @@
-import multiprocessing
-
 from mopidy.mixers import BaseMixer
-from mopidy.utils.process import pickle_connection
 
 class GStreamerSoftwareMixer(BaseMixer):
     """Mixer which uses GStreamer to control volume in software."""
@@ -10,16 +7,7 @@ class GStreamerSoftwareMixer(BaseMixer):
         super(GStreamerSoftwareMixer, self).__init__(*args, **kwargs)
 
     def _get_volume(self):
-        my_end, other_end = multiprocessing.Pipe()
-        self.backend.output_queue.put({
-            'command': 'get_volume',
-            'reply_to': pickle_connection(other_end),
-        })
-        my_end.poll(None)
-        return my_end.recv()
+        return self.backend.output.get_volume()
 
     def _set_volume(self, volume):
-        self.backend.output_queue.put({
-            'command': 'set_volume',
-            'volume': volume,
-        })
+        self.backend.output.set_volume(volume)