#660 Updates audio processing subsystem to use audio segments. Updates audio playback, recording and streaming to use audio segments. Adds support to UserPreferences for sound card selection and audio tone insertion during playback. Adds record preference for WAVE or MP3. Resolves issues with metadata in recordings. (#675)

src/main/java/io/github/dsheirer/audio/playback/AudioChannelPanel.java

@@ -127,6 +127,12 @@ public class AudioChannelPanel extends JPanel implements Listener<AudioEvent>, S
     {
         //Deregister from receiving preference update notifications
         MyEventBus.getEventBus().unregister(this);
+
+        if(mAudioOutput != null)
+        {
+            mAudioOutput.removeAudioEventListener(this);
+            mAudioOutput.removeAudioMetadataListener();
+        }
     }
 
     private void init()