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diff --git a/src/main/java/com/jsyn/unitgen/RangeConverter.java b/src/main/java/com/jsyn/unitgen/RangeConverter.java
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+++ b/src/main/java/com/jsyn/unitgen/RangeConverter.java
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+/*
+ * Copyright 2014 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;
+
+/**
+ * Convert an input signal between -1.0 and +1.0 to the range min to max. This is handy when using
+ * an oscillator as a modulator.
+ * 
+ * @author (C) 2014 Phil Burk, Mobileer Inc
+ * @see EdgeDetector
+ */
+public class RangeConverter extends UnitFilter {
+    public UnitInputPort min;
+    public UnitInputPort max;
+
+    /* Define Unit Ports used by connect() and set(). */
+    public RangeConverter() {
+        addPort(min = new UnitInputPort("Min", 40.0));
+        addPort(max = new UnitInputPort("Max", 2000.0));
+    }
+
+    @Override
+    public void generate(int start, int limit) {
+        double[] inputs = input.getValues();
+        double[] mins = min.getValues();
+        double[] maxs = max.getValues();
+        double[] outputs = output.getValues();
+
+        for (int i = start; i < limit; i++) {
+            double low = mins[i];
+            outputs[i] = low + ((maxs[i] - low) * (inputs[i] + 1) * 0.5);
+        }
+    }
+}