diff --git a/ExampleExportProfiles/librivox-noinit.abprof b/ExampleExportProfiles/librivox-noinit.abprof
new file mode 100644
index 0000000..3b675b2
--- /dev/null
+++ b/ExampleExportProfiles/librivox-noinit.abprof
@@ -0,0 +1,21 @@
+<profile>
+	<code>librivox-noinit</code>
+	<name>LibriVox.org (Without initials)</name>
+	<export>
+		<bitrate>128000</bitrate>
+		<channels>1</channels>
+		<samples>44100</samples>
+		<format>{chapter.name:lower}_{book.author.short:lower}_{file.bitrate.kb}kb</format>
+	</export>
+	<gaps>
+		<pre-chapter>500</pre-chapter>
+		<post-chapter>5000</post-chapter>
+		<post-sentence>400</post-sentence>
+		<followon>100</followon>
+		<post-paragraph>1000</post-paragraph>
+		<post-section>1200</post-section>
+	</gaps>
+	<audio>
+		<rms>-19</rms>
+	</audio>
+</profile>
diff --git a/ExampleExportProfiles/librivox-spc.abprof b/ExampleExportProfiles/librivox-spc.abprof
new file mode 100644
index 0000000..b234b2d
--- /dev/null
+++ b/ExampleExportProfiles/librivox-spc.abprof
@@ -0,0 +1,21 @@
+<profile>
+	<code>librivox-spc</code>
+	<name>LibriVox.org Short Poetry Collection</name>
+	<export>
+		<bitrate>128000</bitrate>
+		<channels>1</channels>
+		<samples>44100</samples>
+		<format>{book.title:lower}_{chapter.name:lower}_{narrator.initials:lower}_{file.bitrate.kb}kb</format>
+	</export>
+	<gaps>
+		<pre-chapter>500</pre-chapter>
+		<post-chapter>5000</post-chapter>
+		<post-sentence>400</post-sentence>
+		<followon>100</followon>
+		<post-paragraph>1000</post-paragraph>
+		<post-section>1200</post-section>
+	</gaps>
+	<audio>
+		<rms>-19</rms>
+	</audio>
+</profile>
diff --git a/ExampleExportFilters/librivox.abprof b/ExampleExportProfiles/librivox.abprof
similarity index 100%
rename from ExampleExportFilters/librivox.abprof
rename to ExampleExportProfiles/librivox.abprof
diff --git a/src/uk/co/majenko/audiobookrecorder/Book.java b/src/uk/co/majenko/audiobookrecorder/Book.java
index 02252fe..e4f7b9f 100644
--- a/src/uk/co/majenko/audiobookrecorder/Book.java
+++ b/src/uk/co/majenko/audiobookrecorder/Book.java
@@ -252,8 +252,11 @@ public class Book extends BookTreeNode {
 
     public Chapter getChapter(int n) {
         Debug.trace();
-        if (n == 0) return null;
-        return (Chapter)getChildAt(n);
+		Object o = getChildAt(n);
+		if (o instanceof Chapter) {
+			return (Chapter)o;
+		}
+		return null;
     }
 
     public Chapter addChapter() {
diff --git a/src/uk/co/majenko/audiobookrecorder/Chapter.java b/src/uk/co/majenko/audiobookrecorder/Chapter.java
index dfcc8c1..32a991c 100644
--- a/src/uk/co/majenko/audiobookrecorder/Chapter.java
+++ b/src/uk/co/majenko/audiobookrecorder/Chapter.java
@@ -100,7 +100,7 @@ public class Chapter extends BookTreeNode {
 
     public int getSequenceNumber() {
         Book book = getBook();
-        int i = 1;
+        int i = 0;
         while (true) {
             Chapter c = book.getChapter(i);
             if (c == null) {
diff --git a/src/uk/co/majenko/audiobookrecorder/Sentence.java b/src/uk/co/majenko/audiobookrecorder/Sentence.java
index b94d54b..65fb685 100644
--- a/src/uk/co/majenko/audiobookrecorder/Sentence.java
+++ b/src/uk/co/majenko/audiobookrecorder/Sentence.java
@@ -106,7 +106,7 @@ public class Sentence extends BookTreeNode implements Cacheable {
 
     double[] waveProfile = null;
  
-    TreeMap<Integer, Double> gainPoints = null;
+    TreeMap<Integer, Double> gainPoints = new TreeMap<Integer, Double>();
 
     RecordingThread recordingThread;
 
@@ -241,7 +241,6 @@ public class Sentence extends BookTreeNode implements Cacheable {
             autoTrimSample();
         }
 
-        gainPoints = new TreeMap<Integer, Double>();
         Element gp = Book.getNode(root, "gainpoints");
         if (gp != null) {
             NodeList points = gp.getElementsByTagName("gainpoint");
@@ -1901,16 +1900,10 @@ public class Sentence extends BookTreeNode implements Cacheable {
 
     public TreeMap<Integer, Double> getGainPoints() {
         Debug.trace();
-        if (gainPoints == null) {
-            gainPoints = new TreeMap<Integer, Double>();
-        }
         return gainPoints;
     }
 
     public void addGainPoint(Integer loc, Double g) {
-        if (gainPoints == null) {
-            gainPoints = new TreeMap<Integer, Double>();
-        }
         gainPoints.put(loc, g);
         refreshAllData();
     }
@@ -1925,10 +1918,6 @@ public class Sentence extends BookTreeNode implements Cacheable {
     }
 
     public void adjustGainPoint(Integer loc, Double adj, boolean reload) {
-        if (gainPoints == null) {
-            gainPoints = new TreeMap<Integer, Double>();
-            return;
-        }
         Double gp = gainPoints.get(loc);
         if (gp == null) return;
         gp += adj;
@@ -2048,10 +2037,11 @@ public class Sentence extends BookTreeNode implements Cacheable {
 
     final int window = 500;
 
-    public double[] getWaveProfile() {
+    public synchronized double[] getWaveProfile() {
         if (waveProfile != null) return waveProfile;
         double[][] samples = getProcessedAudioData();
         if (samples[LEFT].length == 0) return null;
+		System.out.println(String.format("Sample length: %d", samples[LEFT].length));
         waveProfile = new double[samples[LEFT].length];
     
         double rt = 0;