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diff --git a/tests/com/jsyn/examples/EditEnvelope1.java b/tests/com/jsyn/examples/EditEnvelope1.java
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+/*
+ * Copyright 1997 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.
+ */
+/** 
+ * Test Envelope using Java Audio Synthesizer
+ * Trigger attack or release portion.
+ *
+ * @author (C) 1997 Phil Burk
+ */
+
+package com.jsyn.examples;
+
+import java.awt.BorderLayout;
+import java.awt.event.ActionEvent;
+import java.awt.event.ActionListener;
+
+import javax.swing.JApplet;
+import javax.swing.JButton;
+import javax.swing.JPanel;
+
+import com.jsyn.JSyn;
+import com.jsyn.Synthesizer;
+import com.jsyn.data.SegmentedEnvelope;
+import com.jsyn.swing.EnvelopeEditorPanel;
+import com.jsyn.swing.EnvelopePoints;
+import com.jsyn.swing.JAppletFrame;
+import com.jsyn.unitgen.LineOut;
+import com.jsyn.unitgen.SawtoothOscillatorBL;
+import com.jsyn.unitgen.UnitOscillator;
+import com.jsyn.unitgen.VariableRateDataReader;
+import com.jsyn.unitgen.VariableRateMonoReader;
+
+public class EditEnvelope1 extends JApplet {
+    private Synthesizer synth;
+    private UnitOscillator osc;
+    private LineOut lineOut;
+    private SegmentedEnvelope envelope;
+    private VariableRateDataReader envelopePlayer;
+
+    final int MAX_FRAMES = 16;
+    JButton hitme;
+    JButton attackButton;
+    JButton releaseButton;
+    private EnvelopeEditorPanel envEditor;
+    private EnvelopePoints points;
+
+    /* Can be run as either an application or as an applet. */
+    public static void main(String args[]) {
+        EditEnvelope1 applet = new EditEnvelope1();
+        JAppletFrame frame = new JAppletFrame("Test SynthEnvelope", applet);
+        frame.setSize(440, 200);
+        frame.setVisible(true);
+        frame.test();
+    }
+
+    /*
+     * Setup synthesis.
+     */
+    @Override
+    public void start() {
+        setLayout(new BorderLayout());
+
+        // Create a context for the synthesizer.
+        synth = JSyn.createSynthesizer();
+        // Add a tone generator.
+        synth.add(osc = new SawtoothOscillatorBL());
+        // Add an envelope player.
+        synth.add(envelopePlayer = new VariableRateMonoReader());
+
+        envelope = new SegmentedEnvelope(MAX_FRAMES);
+
+        // Add an output mixer.
+        synth.add(lineOut = new LineOut());
+        envelopePlayer.output.connect(osc.amplitude);
+        // Connect the oscillator to the output.
+        osc.output.connect(0, lineOut.input, 0);
+        osc.output.connect(0, lineOut.input, 1);
+
+        // Start synthesizer using default stereo output at 44100 Hz.
+        synth.start();
+
+        JPanel bottomPanel = new JPanel();
+        bottomPanel.add(hitme = new JButton("On"));
+        hitme.addActionListener(new ActionListener() {
+            @Override
+            public void actionPerformed(ActionEvent e) {
+                points.updateEnvelopeIfDirty(envelope);
+                envelopePlayer.dataQueue.queueOn(envelope);
+            }
+        });
+
+        bottomPanel.add(attackButton = new JButton("Off"));
+        attackButton.addActionListener(new ActionListener() {
+            @Override
+            public void actionPerformed(ActionEvent e) {
+                points.updateEnvelopeIfDirty(envelope);
+                envelopePlayer.dataQueue.queueOff(envelope);
+            }
+        });
+
+        bottomPanel.add(releaseButton = new JButton("Queue"));
+        releaseButton.addActionListener(new ActionListener() {
+            @Override
+            public void actionPerformed(ActionEvent e) {
+                points.updateEnvelopeIfDirty(envelope);
+                envelopePlayer.dataQueue.queue(envelope);
+            }
+        });
+
+        add(bottomPanel, BorderLayout.SOUTH);
+        lineOut.start();
+
+        // Create vector of points for editor.
+        points = new EnvelopePoints();
+        points.setName(osc.amplitude.getName());
+
+        // Setup initial envelope shape.
+        points.add(0.5, 1.0);
+        points.add(0.5, 0.2);
+        points.add(0.5, 0.8);
+        points.add(0.5, 0.0);
+        points.updateEnvelope(envelope);
+
+        // Add an envelope editor to the center of the panel.
+        add("Center", envEditor = new EnvelopeEditorPanel(points, MAX_FRAMES));
+
+        /* Synchronize Java display. */
+        getParent().validate();
+        getToolkit().sync();
+    }
+
+    @Override
+    public void stop() {
+        synth.stop();
+    }
+}