Prevent stacking of default effect chain

src/uk/co/majenko/audiobookrecorder/AudiobookRecorder.java

@@ -2212,7 +2212,6 @@ public class AudiobookRecorder extends JFrame {
 
     public boolean enableMicrophone() {
         AudioFormat format = Options.getAudioFormat();
-System.err.println(format);
 
         Mixer.Info mixer = Options.getRecordingMixer();
 

src/uk/co/majenko/audiobookrecorder/Sentence.java

@@ -972,6 +972,8 @@ public class Sentence extends DefaultMutableTreeNode implements Cacheable {
         }
 
         if (effectChain != null) {
+            // Don't double up the default chain
+            if (!effectChain.equals(def)) {
                 eff = AudiobookRecorder.window.effects.get(effectChain);
                 if (eff != null) {
                     eff.init(getAudioFormat().getFrameRate());
@@ -980,6 +982,7 @@ public class Sentence extends DefaultMutableTreeNode implements Cacheable {
                     }
                 }
             }
+        }
         
         // Add final master gain stage
         for (int i = 0; i < samples.length; i++) {