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diff --git a/tests/com/jsyn/examples/PlaySequence.java b/tests/com/jsyn/examples/PlaySequence.java
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+/*
+ * Copyright 2009 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.examples;
+
+import com.jsyn.JSyn;
+import com.jsyn.Synthesizer;
+import com.jsyn.unitgen.LineOut;
+import com.jsyn.unitgen.SawtoothOscillatorBL;
+import com.jsyn.unitgen.UnitOscillator;
+
+/**
+ * Use time stamps to change the frequency of an oscillator at precise times.
+ * 
+ * @author Phil Burk (C) 2009 Mobileer Inc
+ */
+public class PlaySequence {
+    Synthesizer synth;
+    UnitOscillator osc;
+    LineOut lineOut;
+
+    private void test() {
+        // Create a context for the synthesizer.
+        synth = JSyn.createSynthesizer();
+
+        // Add a tone generator.
+        synth.add(osc = new SawtoothOscillatorBL());
+        // Add an output mixer.
+        synth.add(lineOut = new LineOut());
+
+        // Connect the oscillator to the left and right audio 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();
+        // We only need to start the LineOut. It will pull data from the
+        // oscillator.
+        lineOut.start();
+
+        // Get synthesizer time in seconds.
+        double timeNow = synth.getCurrentTime();
+
+        // Advance to a near future time so we have a clean start.
+        double time = timeNow + 0.5;
+        double freq = 400.0; // hertz
+        osc.frequency.set(freq, time);
+
+        // Schedule this to happen a bit later.
+        time += 0.5;
+        freq *= 1.5; // up a perfect fifth
+        osc.frequency.set(freq, time);
+
+        time += 0.5;
+        freq *= 4.0 / 5.0; // down a major third
+        osc.frequency.set(freq, time);
+
+        // Sleep while the sound is being generated in the background thread.
+        try {
+            synth.sleepUntil(time + 0.5);
+        } catch (InterruptedException e) {
+            e.printStackTrace();
+        }
+
+        // Stop everything.
+        synth.stop();
+    }
+
+    public static void main(String[] args) {
+        new PlaySequence().test();
+    }
+}