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diff --git a/apps/OboeTester/app/src/main/cpp/synth/SineOscillator.h b/apps/OboeTester/app/src/main/cpp/synth/SineOscillator.h
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+++ b/apps/OboeTester/app/src/main/cpp/synth/SineOscillator.h
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+/*
+ * Copyright (C) 2016 The Android Open Source Project
+ *
+ * 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.
+ *
+ * This code was translated from the JSyn Java code.
+ * JSyn is Copyright 2009 Phil Burk, Mobileer Inc
+ * JSyn is licensed under the Apache License, Version 2.0
+ */
+
+#ifndef SYNTHMARK_SINE_OSCILLATOR_H
+#define SYNTHMARK_SINE_OSCILLATOR_H
+
+#include <cstdint>
+#include <math.h>
+#include "SynthTools.h"
+
+namespace marksynth {
+class SineOscillator  : public SawtoothOscillator
+{
+public:
+    SineOscillator()
+    : SawtoothOscillator() {}
+
+    virtual ~SineOscillator() = default;
+
+    virtual inline synth_float_t translatePhase(synth_float_t phase, synth_float_t phaseIncrement) {
+        (void) phaseIncrement;
+        return SynthTools::fastSine(phase * M_PI);
+    }
+
+};
+};
+#endif // SYNTHMARK_SINE_OSCILLATOR_H