diff --git a/libraries/audio/src/AudioSourceTone.cpp b/libraries/audio/src/AudioSourceTone.cpp
new file mode 100644
index 0000000000..e9b6e103c4
--- /dev/null
+++ b/libraries/audio/src/AudioSourceTone.cpp
@@ -0,0 +1,59 @@
+//
+//  AudioSourceTone.cpp
+//  hifi
+//
+//  Created by Craig Hansen-Sturm on 8/10/14.
+//  Copyright 2014 High Fidelity, Inc.
+//
+//  Distributed under the Apache License, Version 2.0.
+//  See the accompanying file LICENSE or http://www.apache.org/licenses/LICENSE-2.0.html
+//
+
+#include <assert.h>
+#include <math.h>
+#include <SharedUtil.h>
+#include "AudioRingBuffer.h"
+#include "AudioFormat.h"
+#include "AudioBuffer.h"
+#include "AudioSourceTone.h"
+
+AudioSourceTone::AudioSourceTone() {
+    initialize();
+}
+
+AudioSourceTone::~AudioSourceTone() {
+    finalize();
+}
+
+void AudioSourceTone::finalize() {
+}
+
+void AudioSourceTone::reset() {
+}
+
+inline void AudioSourceTone::updateCoefficients() {
+    _omega = _frequency / _sampleRate * TWO_PI;
+    _epsilon = 2.0f * sinf(_omega / 2.0f);
+    _yq1 = cosf(-1.0f * _omega);
+    _y1 = sinf(+1.0f * _omega);   
+}
+
+inline void AudioSourceTone::initialize() {
+    const float32_t FREQUENCY_220_HZ = 220.0f;
+    const float32_t GAIN_MINUS_3DB = 0.708f;
+    setParameters(SAMPLE_RATE, FREQUENCY_220_HZ, GAIN_MINUS_3DB);
+}
+
+inline void AudioSourceTone::setParameters(const float32_t sampleRate, const float32_t frequency,  const float32_t amplitude) {
+    _sampleRate = std::max(sampleRate, 1.0f);
+    _frequency = std::max(frequency, 1.0f);
+    _amplitude = std::max(amplitude, 1.0f);
+    updateCoefficients();
+}
+
+inline void AudioSourceTone::getParameters(float32_t& sampleRate, float32_t& frequency, float32_t& amplitude) {
+    sampleRate = _sampleRate;
+    frequency = _frequency;
+    amplitude = _amplitude;
+}
+