diff --git a/src/davaguine/jeq/core/IIR.java b/src/davaguine/jeq/core/IIR.java
index 26a208f..5d2a4f2 100644
--- a/src/davaguine/jeq/core/IIR.java
+++ b/src/davaguine/jeq/core/IIR.java
@@ -40,6 +40,7 @@ public class IIR extends IIRBase {
     public final static float EQ_22050_RATE = 22050;
     public final static float EQ_44100_RATE = 44100;
     public final static float EQ_48000_RATE = 48000;
+    public final static float EQ_96000_RATE = 96000;
     /**
      * Supported number of bands
      */
@@ -108,7 +109,7 @@ public class IIR extends IIRBase {
      * @return true if parameters are supported
      */
     public static boolean isParamsSupported(int bands, float rate, int channels) {
-        if (rate != EQ_11025_RATE && rate != EQ_22050_RATE && rate != EQ_44100_RATE && rate != EQ_48000_RATE)
+        if (rate != EQ_11025_RATE && rate != EQ_22050_RATE && rate != EQ_44100_RATE && rate != EQ_48000_RATE && rate != EQ_96000_RATE)
             return false;
 
         switch (bands) {
@@ -180,6 +181,12 @@ public class IIR extends IIRBase {
                     iircf = iir_cf10_48000;
                     break;
             }
+        } else if (rate == EQ_96000_RATE) {
+            switch (bands) {
+                case 31:
+                    iircf = iir_cf31_96000;
+                    break;
+            }
         }
     }
 
diff --git a/src/davaguine/jeq/core/IIRBase.java b/src/davaguine/jeq/core/IIRBase.java
index 350406c..b37e540 100644
--- a/src/davaguine/jeq/core/IIRBase.java
+++ b/src/davaguine/jeq/core/IIRBase.java
@@ -410,4 +410,68 @@ public class IIRBase {
             /* 20k Hz*/
             new IIRCoefficients(6.0884213704e-01, 1.9557893148e-01, -1.3932981614e+00),
     };
+    public final static IIRCoefficients iir_cf31_96000[] = {
+            /* 20 Hz*/
+            new IIRCoefficients(9.9939388451e-01, 3.0305774630e-04, 1.9993870327e+00),
+            /* 25 Hz*/
+            new IIRCoefficients(9.9924247917e-01, 3.7876041632e-04, 1.9992317740e+00),
+            /* 31.5 Hz*/
+            new IIRCoefficients(9.9904564663e-01, 4.7717668529e-04, 1.9990286528e+00),
+            /* 40 Hz*/
+            new IIRCoefficients(9.9878827195e-01, 6.0586402557e-04, 1.9987608731e+00),
+            /* 50 Hz*/
+            new IIRCoefficients(9.9848556942e-01, 7.5721528829e-04, 1.9984427652e+00),
+            /* 63 Hz*/
+            new IIRCoefficients(9.9809219264e-01, 9.5390367779e-04, 1.9980242502e+00),
+            /* 80 Hz*/
+            new IIRCoefficients(9.9757801538e-01, 1.2109923088e-03, 1.9974684869e+00),
+            /* 100 Hz*/
+            new IIRCoefficients(9.9697343933e-01, 1.5132803374e-03, 1.9968023538e+00),
+            /* 125 Hz*/
+            new IIRCoefficients(9.9621823598e-01, 1.8908820086e-03, 1.9959510180e+00),
+            /* 160 Hz*/
+            new IIRCoefficients(9.9516191728e-01, 2.4190413595e-03, 1.9947243453e+00),
+            /* 200 Hz*/
+            new IIRCoefficients(9.9395607757e-01, 3.0219612131e-03, 1.9932727986e+00),
+            /* 250 Hz*/
+            new IIRCoefficients(9.9245085008e-01, 3.7745749576e-03, 1.9913840669e+00),
+            /* 315 Hz*/
+            new IIRCoefficients(9.9049749914e-01, 4.7512504310e-03, 1.9888056233e+00),
+            /* 400 Hz*/
+            new IIRCoefficients(9.8794899744e-01, 6.0255012789e-03, 1.9852245824e+00),
+            /* 500 Hz*/
+            new IIRCoefficients(9.8495930023e-01, 7.5203498850e-03, 1.9807093500e+00),
+            /* 630 Hz*/
+            new IIRCoefficients(9.8108651246e-01, 9.4567437704e-03, 1.9743538683e+00),
+            /* 800 Hz*/
+            new IIRCoefficients(9.7604570090e-01, 1.1977149551e-02, 1.9652207158e+00),
+            /* 1k Hz*/
+            new IIRCoefficients(9.7014963927e-01, 1.4925180364e-02, 1.9532947360e+00),
+            /* 1.25k Hz*/
+            new IIRCoefficients(9.6283181641e-01, 1.8584091793e-02, 1.9366149237e+00),
+            /* 1.6k Hz*/
+            new IIRCoefficients(9.5268463224e-01, 2.3657683878e-02, 1.9100137880e+00),
+            /* 2k Hz*/
+            new IIRCoefficients(9.4122788957e-01, 2.9386055213e-02, 1.8750821533e+00),
+            /* 2.5k Hz*/
+            new IIRCoefficients(9.2711765003e-01, 3.6441174983e-02, 1.8248457659e+00),
+            /* 3.15k Hz*/
+            new IIRCoefficients(9.0912548757e-01, 4.5437256213e-02, 1.7491177803e+00),
+            /* 4k Hz*/
+            new IIRCoefficients(8.8619860800e-01, 5.6900696000e-02, 1.6334959111e+00),
+            /* 5k Hz*/
+            new IIRCoefficients(8.6010264114e-01, 6.9948679430e-02, 1.4757186436e+00),
+            /* 6.3k Hz*/
+            new IIRCoefficients(8.2760520925e-01, 8.6197395374e-02, 1.2405797786e+00),
+            /* 8k Hz*/
+            new IIRCoefficients(7.8757448309e-01, 1.0621275845e-01, 8.9378724155e-01),
+            /* 10k Hz*/
+            new IIRCoefficients(7.4415362476e-01, 1.2792318762e-01, 4.5142017567e-01),
+            /* 12.5k Hz*/
+            new IIRCoefficients(6.9581428034e-01, 1.5209285983e-01, -1.1091156053e-01),
+            /* 16k Hz*/
+            new IIRCoefficients(6.4120506488e-01, 1.7939746756e-01, -8.2060253244e-01),
+            /* 20k Hz*/
+            new IIRCoefficients(6.0884213704e-01, 1.9557893148e-01, -1.3932981614e+00),
+    };
 }
diff --git a/src/uk/co/majenko/audiobookrecorder/AudiobookRecorder.java b/src/uk/co/majenko/audiobookrecorder/AudiobookRecorder.java
index aa4d77d..bfdce56 100644
--- a/src/uk/co/majenko/audiobookrecorder/AudiobookRecorder.java
+++ b/src/uk/co/majenko/audiobookrecorder/AudiobookRecorder.java
@@ -1619,8 +1619,18 @@ public class AudiobookRecorder extends JFrame {
                             bookTree.setSelectionPath(new TreePath(s.getPath()));
                         }
                     }
+                    play.drain();
+                    play.stop();
+                    play.close();
+                    play = null;
                 } catch (Exception e) {
                     playing = null;
+                    if (play != null) {
+                        play.drain();
+                        play.stop();
+                        play.close();
+                    }
+                    play = null;
                 }
                 toolBar.enableSentence();
                 toolBar.disableStop();
@@ -1720,6 +1730,8 @@ public class AudiobookRecorder extends JFrame {
         } catch (Exception e) {
             e.printStackTrace();
         }
+        microphone = null;
+        microphoneStream = null;
     } 
 
     public void execScript(String s) {
diff --git a/src/uk/co/majenko/audiobookrecorder/Equaliser.java b/src/uk/co/majenko/audiobookrecorder/Equaliser.java
index 599222c..bb913f0 100644
--- a/src/uk/co/majenko/audiobookrecorder/Equaliser.java
+++ b/src/uk/co/majenko/audiobookrecorder/Equaliser.java
@@ -56,11 +56,20 @@ public class Equaliser extends JPanel {
                 }
             }
         });
+        JButton load = new JButton("Load from default");
+        load.addActionListener(new ActionListener() {
+            public void actionPerformed(ActionEvent e) {
+                for (int i = 0; i < 31; i++) {
+                    channels[i].setValue(Options.getFloat("audio.eq." + i));
+                }
+            }
+        });
 
         JPanel buttons = new JPanel();
         buttons.setLayout(new FlowLayout());
         buttons.add(smooth);
         buttons.add(def);
+        buttons.add(load);
 
         add(buttons, BorderLayout.SOUTH);
     }
diff --git a/src/uk/co/majenko/audiobookrecorder/Options.java b/src/uk/co/majenko/audiobookrecorder/Options.java
index 2ffdf42..45249af 100644
--- a/src/uk/co/majenko/audiobookrecorder/Options.java
+++ b/src/uk/co/majenko/audiobookrecorder/Options.java
@@ -345,7 +345,7 @@ public class Options extends JDialog {
         TreeSet<KVPair> list = new TreeSet<KVPair>();
 
         AudioFormat stereoFormat = new AudioFormat(44100f, 16, 2, true, false);
-        AudioFormat monoFormat = new AudioFormat(44100f, 16, 2, true, false);
+        AudioFormat monoFormat = new AudioFormat(44100f, 16, 1, true, false);
 
         DataLine.Info stereoDIF = new DataLine.Info(TargetDataLine.class, stereoFormat);
         DataLine.Info monoDIF = new DataLine.Info(TargetDataLine.class, monoFormat);
@@ -381,7 +381,7 @@ public class Options extends JDialog {
         TreeSet<KVPair> list = new TreeSet<KVPair>();
 
         AudioFormat stereoFormat = new AudioFormat(44100f, 16, 2, true, false);
-        AudioFormat monoFormat = new AudioFormat(44100f, 16, 2, true, false);
+        AudioFormat monoFormat = new AudioFormat(44100f, 16, 1, true, false);
 
         DataLine.Info stereoDIF = new DataLine.Info(SourceDataLine.class, stereoFormat);
         DataLine.Info monoDIF = new DataLine.Info(SourceDataLine.class, monoFormat);
diff --git a/src/uk/co/majenko/audiobookrecorder/Sentence.java b/src/uk/co/majenko/audiobookrecorder/Sentence.java
index de9a363..19a80e1 100644
--- a/src/uk/co/majenko/audiobookrecorder/Sentence.java
+++ b/src/uk/co/majenko/audiobookrecorder/Sentence.java
@@ -497,8 +497,8 @@ public class Sentence extends DefaultMutableTreeNode implements Cacheable {
 
             AudioFormat format = eq.getFormat();
 
-//            IIRControls controls = eq.getControls();
-//            AudiobookRecorder.window.book.equaliser.apply(controls, format.getChannels());
+            IIRControls controls = eq.getControls();
+            AudiobookRecorder.window.book.equaliser.apply(controls, format.getChannels());
 
             int frameSize = format.getFrameSize();
 
@@ -511,7 +511,7 @@ public class Sentence extends DefaultMutableTreeNode implements Cacheable {
     
             play.start();
 
-            byte[] buffer = new byte[50000];
+            byte[] buffer = new byte[1024];
 
             eq.skip(pos);
             
@@ -660,6 +660,7 @@ public class Sentence extends DefaultMutableTreeNode implements Cacheable {
     public int findNearestZeroCrossing(int pos, int range) {
         int[] data = getAudioData();
         if (data == null) return 0;
+        if (data.length == 0) return 0;
 
         if (pos < 0) pos = 0;
         if (pos >= data.length) pos = data.length-1;
diff --git a/src/uk/co/majenko/audiobookrecorder/Waveform.java b/src/uk/co/majenko/audiobookrecorder/Waveform.java
index 19048cc..f3a0648 100644
--- a/src/uk/co/majenko/audiobookrecorder/Waveform.java
+++ b/src/uk/co/majenko/audiobookrecorder/Waveform.java
@@ -49,6 +49,7 @@ public class Waveform extends JPanel {
 
             int num = samples.length;
             int step = num / w;
+            if (step == 0) return;
 
             for (int n = 0; n < w; n++) {
                 int hcnt = 0;