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diff --git a/src/main/java/com/jsyn/unitgen/CrossFade.java b/src/main/java/com/jsyn/unitgen/CrossFade.java
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+++ b/src/main/java/com/jsyn/unitgen/CrossFade.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.unitgen;
+
+import com.jsyn.ports.UnitInputPort;
+import com.jsyn.ports.UnitOutputPort;
+
+/**
+ * Linear CrossFade between parts of the input.
+ * <P>
+ * Mix input[0] and input[1] based on the value of "fade". When fade is -1, output is all input[0].
+ * When fade is 0, output is half input[0] and half input[1]. When fade is +1, output is all
+ * input[1].
+ * <P>
+ *
+ * @author Phil Burk (C) 2009 Mobileer Inc
+ * @version 016
+ * @see Pan
+ */
+public class CrossFade extends UnitGenerator {
+    public UnitInputPort input;
+    public UnitInputPort fade;
+    public UnitOutputPort output;
+
+    /* Define Unit Ports used by connect() and set(). */
+    public CrossFade() {
+        addPort(input = new UnitInputPort(2, "Input"));
+        addPort(fade = new UnitInputPort("Fade"));
+        fade.setup(-1.0, 0.0, 1.0);
+        addPort(output = new UnitOutputPort());
+    }
+
+    @Override
+    public void generate(int start, int limit) {
+        double[] input0s = input.getValues(0);
+        double[] input1s = input.getValues(1);
+        double[] fades = fade.getValues();
+        double[] outputs = output.getValues();
+        for (int i = start; i < limit; i++) {
+            // Scale and offset to 0.0 to 1.0 range.
+            double gain = (fades[i] * 0.5) + 0.5;
+            outputs[i] = (input0s[i] * (1.0 - gain)) + (input1s[i] * gain);
+        }
+    }
+
+}