diff --git a/src/uk/co/majenko/audiobookrecorder/AudiobookRecorder.java b/src/uk/co/majenko/audiobookrecorder/AudiobookRecorder.java
index 7c6a7ce..246bcde 100644
--- a/src/uk/co/majenko/audiobookrecorder/AudiobookRecorder.java
+++ b/src/uk/co/majenko/audiobookrecorder/AudiobookRecorder.java
@@ -30,8 +30,6 @@ public class AudiobookRecorder extends JFrame {
 
     // Settings - tweakable
 
-    public static final int PLAYBACK_CHUNK_SIZE = 1024;
-
     public static final String SPHINX_MODEL = "resource:/edu/cmu/sphinx/models/en-us/en-us";
 
     static Properties config = new Properties();
@@ -2178,6 +2176,8 @@ public class AudiobookRecorder extends JFrame {
 
                 try {
 
+                    int blockSize = Options.getInteger("audio.playback.blocksize");
+
                     AudioFormat sampleformat = s.getAudioFormat();
                     float sampleRate = sampleformat.getSampleRate();
 //                    sampleRate *= toolBar.getPlaybackSpeed();
@@ -2190,10 +2190,10 @@ public class AudiobookRecorder extends JFrame {
 
                     bookTree.scrollPathToVisible(new TreePath(s.getPath()));
                     data = s.getPCMData(effectsEnabled);
-                    for (int pos = 0; pos < data.length; pos += PLAYBACK_CHUNK_SIZE) {
+                    for (int pos = 0; pos < data.length; pos += blockSize) {
                         sampleWaveform.setPlayMarker(pos / format.getFrameSize());
                         int l = data.length - pos;
-                        if (l > PLAYBACK_CHUNK_SIZE) l = PLAYBACK_CHUNK_SIZE;
+                        if (l > blockSize) l = blockSize;
                         play.write(data, pos, l);
                     }
 
@@ -2342,6 +2342,8 @@ public class AudiobookRecorder extends JFrame {
 
                 try {
 
+                    int blockSize = Options.getInteger("audio.playback.blocksize");
+
                     AudioFormat sampleformat = s.getAudioFormat();
                     AudioFormat format = new AudioFormat(sampleformat.getSampleRate(), 16, 2, true, false);
 
@@ -2373,10 +2375,10 @@ public class AudiobookRecorder extends JFrame {
                     if (startPos > data.length) startPos = data.length;
                     if (endPos > data.length) endPos = data.length;
 
-                    for (int pos = startPos; pos < endPos; pos += PLAYBACK_CHUNK_SIZE) {
+                    for (int pos = startPos; pos < endPos; pos += blockSize) {
                         sampleWaveform.setPlayMarker(pos / format.getFrameSize());
                         int l = data.length - pos;
-                        if (l > PLAYBACK_CHUNK_SIZE) l = PLAYBACK_CHUNK_SIZE;
+                        if (l > blockSize) l = blockSize;
                         play.write(data, pos, l);
                     }
 
@@ -2418,6 +2420,8 @@ public class AudiobookRecorder extends JFrame {
 
                 try {
 
+                    int blockSize = Options.getInteger("audio.playback.blocksize");
+
                     AudioFormat sampleformat = s.getAudioFormat();
                     float sampleRate = sampleformat.getSampleRate();
                     sampleRate *= toolBar.getPlaybackSpeed();
@@ -2451,10 +2455,10 @@ public class AudiobookRecorder extends JFrame {
                             });
                             t.start();
                         }
-                        for (int pos = 0; pos < data.length; pos += PLAYBACK_CHUNK_SIZE) {
+                        for (int pos = 0; pos < data.length; pos += blockSize) {
                             sampleWaveform.setPlayMarker(pos / format.getFrameSize());
                             int l = data.length - pos;
-                            if (l > PLAYBACK_CHUNK_SIZE) l = PLAYBACK_CHUNK_SIZE;
+                            if (l > blockSize) l = blockSize;
                             play.write(data, pos, l);
                         }
 
diff --git a/src/uk/co/majenko/audiobookrecorder/Options.java b/src/uk/co/majenko/audiobookrecorder/Options.java
index 0f6c4fc..2418267 100644
--- a/src/uk/co/majenko/audiobookrecorder/Options.java
+++ b/src/uk/co/majenko/audiobookrecorder/Options.java
@@ -25,6 +25,7 @@ public class Options extends JDialog {
     JComboBox<KVPair> bitDepth;
     JComboBox<KVPair> trimMethod;
     JComboBox<KVPair> fftBlockSize;
+    JComboBox<KVPair> playbackBlockSize;
     JTextField storageFolder;
     JTextField archiveFolder;
     JSpinner preChapterGap;
@@ -303,6 +304,7 @@ public class Options extends JDialog {
         addSeparator(optionsPanel);
 
         playbackList = addDropdown(optionsPanel, "Playback device:", getPlaybackMixerList(), get("audio.playback.device"));
+        playbackBlockSize = addDropdown(optionsPanel, "Playback Block size:", getPlaybackBlockSizes(), get("audio.playback.blocksize"));
         addSeparator(optionsPanel);
         storageFolder = addFilePath(optionsPanel, "Storage folder:", get("path.storage"), true);
         archiveFolder = addFilePath(optionsPanel, "Archive folder:", get("path.archive"), true);
@@ -568,6 +570,7 @@ public class Options extends JDialog {
             defaultPrefs.put("audio.playback.device", "");
         }
         defaultPrefs.put("audio.recording.trim.blocksize", "4096");
+        defaultPrefs.put("audio.playback.blocksize", "4096");
 
         defaultPrefs.put("catenation.pre-chapter", "1000");
         defaultPrefs.put("catenation.post-chapter", "1500");
@@ -712,6 +715,7 @@ public class Options extends JDialog {
         set("cache.size", cacheSize.getValue());
         set("audio.recording.trim.fft", fftThreshold.getValue());
         set("audio.recording.trim.blocksize", ((KVPair)fftBlockSize.getSelectedItem()).key);
+        set("audio.playback.blocksize", ((KVPair)playbackBlockSize.getSelectedItem()).key);
 
         set("effects.ethereal.offset", etherealOffset.getValue());
         set("effects.ethereal.iterations", etherealIterations.getValue());
@@ -799,6 +803,18 @@ public class Options extends JDialog {
         return pairs;
     }
 
+    public static KVPair[] getPlaybackBlockSizes() {
+        KVPair[] pairs = new KVPair[8];
+        pairs[0] = new KVPair<String, String>("1024", "1024");
+        pairs[1] = new KVPair<String, String>("2048", "2048");
+        pairs[2] = new KVPair<String, String>("4096", "4096");
+        pairs[3] = new KVPair<String, String>("8192", "8192");
+        pairs[4] = new KVPair<String, String>("16384", "16384");
+        pairs[5] = new KVPair<String, String>("32768", "32768");
+        pairs[6] = new KVPair<String, String>("65536", "65537");
+        pairs[7] = new KVPair<String, String>("131072", "131072");
+        return pairs;
+    }
 
     public static void createEffectChains() {
         effectChains = new ArrayList<EffectGroup>();