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diff --git a/src/main/java/com/jsyn/apps/InstrumentTester.java b/src/main/java/com/jsyn/apps/InstrumentTester.java
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+/*
+ * Copyright 2012 Phil Burk, Mobileer Inc
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.jsyn.apps;
+
+import java.awt.BorderLayout;
+import java.io.IOException;
+
+import javax.sound.midi.MidiDevice;
+import javax.sound.midi.MidiMessage;
+import javax.sound.midi.MidiUnavailableException;
+import javax.sound.midi.Receiver;
+import javax.swing.JApplet;
+
+import com.jsyn.JSyn;
+import com.jsyn.Synthesizer;
+import com.jsyn.devices.javasound.MidiDeviceTools;
+import com.jsyn.instruments.JSynInstrumentLibrary;
+import com.jsyn.midi.MessageParser;
+import com.jsyn.swing.InstrumentBrowser;
+import com.jsyn.swing.JAppletFrame;
+import com.jsyn.swing.PresetSelectionListener;
+import com.jsyn.swing.SoundTweaker;
+import com.jsyn.unitgen.LineOut;
+import com.jsyn.unitgen.UnitSource;
+import com.jsyn.unitgen.UnitVoice;
+import com.jsyn.util.PolyphonicInstrument;
+import com.jsyn.util.VoiceDescription;
+import com.softsynth.math.AudioMath;
+import com.softsynth.shared.time.TimeStamp;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+/**
+ * Let the user select an instrument using the InstrumentBrowser and play
+ * them using the ASCII keyboard or with MIDI.
+ * Sound parameters can be tweaked using faders.
+ *
+ * @author Phil Burk (C) 2012 Mobileer Inc
+ */
+public class InstrumentTester extends JApplet {
+
+    private static final Logger LOGGER = LoggerFactory.getLogger(InstrumentTester.class);
+    private static final long serialVersionUID = -2704222221111608377L;
+
+    private Synthesizer synth;
+    private LineOut lineOut;
+    private SoundTweaker tweaker;
+    protected PolyphonicInstrument instrument;
+    private MyParser messageParser;
+
+    class MyParser extends MessageParser {
+
+        @Override
+        public void controlChange(int channel, int index, int value) {
+        }
+
+        @Override
+        public void noteOff(int channel, int noteNumber, int velocity) {
+            instrument.noteOff(noteNumber, synth.createTimeStamp());
+        }
+
+        @Override
+        public void noteOn(int channel, int noteNumber, int velocity) {
+            double frequency = AudioMath.pitchToFrequency(noteNumber);
+            double amplitude = velocity / (4 * 128.0);
+            TimeStamp timeStamp = synth.createTimeStamp();
+            instrument.noteOn(noteNumber, frequency, amplitude, timeStamp);
+        }
+
+    }
+
+    // Write a Receiver to get the messages from a Transmitter.
+    class CustomReceiver implements Receiver {
+        @Override
+        public void close() {
+            System.out.print("Closed.");
+        }
+
+        @Override
+        public void send(MidiMessage message, long timeStamp) {
+            byte[] bytes = message.getMessage();
+            messageParser.parse(bytes);
+        }
+    }
+
+    public int setupMidiKeyboard() throws MidiUnavailableException, IOException, InterruptedException {
+        messageParser = new MyParser();
+
+        int result = 2;
+        MidiDevice keyboard = MidiDeviceTools.findKeyboard();
+        Receiver receiver = new CustomReceiver();
+        // Just use default synthesizer.
+        if (keyboard != null) {
+            // If you forget to open them you will hear no sound.
+            keyboard.open();
+            // Put the receiver in the transmitter.
+            // This gives fairly low latency playing.
+            keyboard.getTransmitter().setReceiver(receiver);
+            LOGGER.debug("Play MIDI keyboard: " + keyboard.getDeviceInfo().getDescription());
+            result = 0;
+        } else {
+            LOGGER.debug("Could not find a keyboard.");
+        }
+        return result;
+    }
+
+    @Override
+    public void init() {
+        setLayout(new BorderLayout());
+
+        synth = JSyn.createSynthesizer();
+        synth.add(lineOut = new LineOut());
+
+        InstrumentBrowser browser = new InstrumentBrowser(new JSynInstrumentLibrary());
+        browser.addPresetSelectionListener(new PresetSelectionListener() {
+
+            @Override
+            public void presetSelected(VoiceDescription voiceDescription, int presetIndex) {
+                UnitVoice[] voices = new UnitVoice[8];
+                for (int i = 0; i < voices.length; i++) {
+                    voices[i] = voiceDescription.createUnitVoice();
+                }
+                instrument = new PolyphonicInstrument(voices);
+                synth.add(instrument);
+                instrument.usePreset(presetIndex, synth.createTimeStamp());
+                String title = voiceDescription.getVoiceClassName() + ": "
+                        + voiceDescription.getPresetNames()[presetIndex];
+                useSource(instrument, title);
+            }
+        });
+        add(browser, BorderLayout.NORTH);
+
+        try {
+            setupMidiKeyboard();
+        } catch (MidiUnavailableException e) {
+            // TODO Auto-generated catch block
+            e.printStackTrace();
+        } catch (IOException e) {
+            // TODO Auto-generated catch block
+            e.printStackTrace();
+        } catch (InterruptedException e) {
+            // TODO Auto-generated catch block
+            e.printStackTrace();
+        }
+
+        validate();
+    }
+
+    private void useSource(UnitSource voice, String title) {
+
+        lineOut.input.disconnectAll(0);
+        lineOut.input.disconnectAll(1);
+
+        // Connect the source to both left and right output.
+        voice.getOutput().connect(0, lineOut.input, 0);
+        voice.getOutput().connect(0, lineOut.input, 1);
+
+        if (tweaker != null) {
+            remove(tweaker);
+        }
+        try {
+            if (synth.isRunning()) {
+                synth.sleepFor(0.1);
+            }
+        } catch (InterruptedException e) {
+            e.printStackTrace();
+        }
+        tweaker = new SoundTweaker(synth, title, voice);
+        add(tweaker, BorderLayout.CENTER);
+        validate();
+    }
+
+    @Override
+    public void start() {
+        // Start synthesizer using default stereo output at 44100 Hz.
+        synth.start();
+        // We only need to start the LineOut. It will pull data from the
+        // oscillator.
+        lineOut.start();
+    }
+
+    @Override
+    public void stop() {
+        synth.stop();
+    }
+
+    /* Can be run as either an application or as an applet. */
+    public static void main(String[] args) {
+        InstrumentTester applet = new InstrumentTester();
+        JAppletFrame frame = new JAppletFrame("InstrumentTester", applet);
+        frame.setSize(600, 800);
+        frame.setVisible(true);
+        frame.test();
+    }
+
+}