diff --git a/Tone/instrument/DuoSynth.js b/Tone/instrument/DuoSynth.js
index 52ceac8d..3a6d462d 100644
--- a/Tone/instrument/DuoSynth.js
+++ b/Tone/instrument/DuoSynth.js
@@ -26,12 +26,14 @@ define(["Tone/core/Tone", "Tone/instrument/MonoSynth", "Tone/component/LFO", "To
 		 *  @type {Tone.MonoSynth}
 		 */
 		this.voice0 = new Tone.MonoSynth(options.voice0);
+		this.voice0.setVolume(-10);
 
 		/**
 		 *  the second voice
 		 *  @type {Tone.MonoSynth}
 		 */
 		this.voice1 = new Tone.MonoSynth(options.voice1);
+		this.voice1.setVolume(-10);
 
 		/**
 		 *  the vibrato lfo
@@ -101,28 +103,37 @@ define(["Tone/core/Tone", "Tone/instrument/MonoSynth", "Tone/component/LFO", "To
 		"portamento" : 0.05,
 		"voiceRatio" : 1.5,
 		"voice0" : {
+			"volume" : -10,
 			"portamento" : 0,
-			"osc0type" : "sine",
-			"osc1type" : "sawtooth",
-			"unison" : 20,
+			"oscType" : "sine",
 			"filterEnvelope" : {
 				"attack" : 0.01,
 				"decay" : 0.0,
 				"sustain" : 1,
 				"release" : 0.5
+			},
+			"envelope" : {
+				"attack" : 0.01,
+				"decay" : 0.0,
+				"sustain" : 1,
+				"release" : 0.5
 			}
 		},
 		"voice1" : {
-			"volume" : -6,
+			"volume" : -10,
 			"portamento" : 0,
-			"osc0type" : "square",
-			"osc1type" : "square",
-			"unison" : 10,
+			"oscType" : "sine",
 			"filterEnvelope" : {
 				"attack" : 0.01,
 				"decay" : 0.0,
 				"sustain" : 1,
 				"release" : 0.5
+			},
+			"envelope" : {
+				"attack" : 0.01,
+				"decay" : 0.0,
+				"sustain" : 1,
+				"release" : 0.5
 			}
 		}
 	};
@@ -172,7 +183,7 @@ define(["Tone/core/Tone", "Tone/instrument/MonoSynth", "Tone/component/LFO", "To
 	 *  set the ratio between the two oscillator
 	 *  @param {number} ratio
 	 */
-	Tone.DuoSynth.prototype.setOscRatio = function(ratio){
+	Tone.DuoSynth.prototype.setVoiceRatio = function(ratio){
 		this._frequencyRatio.setValue(ratio);
 	};
 
@@ -209,16 +220,23 @@ define(["Tone/core/Tone", "Tone/instrument/MonoSynth", "Tone/component/LFO", "To
 		this._vibrato.setFrequency(rate);
 	};
 
+	/**
+	 *  set the volume of the instrument.
+	 *  borrowed from {@link Tone.Source}
+	 *  @function
+	 */
+	Tone.DuoSynth.prototype.setVolume = Tone.Source.prototype.setVolume;
+
 	/**
 	 *  bulk setter
 	 *  @param {Object} param 
 	 */
 	Tone.DuoSynth.prototype.set = function(params){
-		if (!this.isUndef(params.oscRatio)) this.setOscRatio(params.oscRatio);
+		if (!this.isUndef(params.voiceRatio)) this.setVoiceRatio(params.voiceRatio);
 		if (!this.isUndef(params.vibratoRate)) this.setVibratoRate(params.vibratoRate);
 		if (!this.isUndef(params.vibratoAmount)) this.setVibratoAmount(params.vibratoAmount);
 		if (!this.isUndef(params.vibratoDelay)) this.setVibratoDelay(params.vibratoDelay);
-		if (!this.isUndef(params.portamento)) this.portament = this.toSeconds(params.portamento);
+		if (!this.isUndef(params.portamento)) this.setPortamento(params.portamento);
 		if (!this.isUndef(params.voice0)) this.voice0.set(params.voice0);
 		if (!this.isUndef(params.voice1)) this.voice1.set(params.voice1);
 	};
diff --git a/Tone/instrument/preset/DuoSynth.preset.js b/Tone/instrument/preset/DuoSynth.preset.js
new file mode 100644
index 00000000..1a3a36ca
--- /dev/null
+++ b/Tone/instrument/preset/DuoSynth.preset.js
@@ -0,0 +1,135 @@
+define(["Tone/core/Tone", "Tone/instrument/DuoSynth"], function(Tone){
+
+	/**
+	 *  named presets for the DuoSynth
+	 *  @const
+	 *  @static
+	 *  @type {Object}
+	 */
+	Tone.DuoSynth.preset = {
+		"Steely" : {
+			"vibratoAmount" : 0.0,
+			"vibratoRate" : 5,
+			"vibratoDelay" : 1,
+			"portamento" : 0,
+			"voiceRatio" : 1.99,
+			"voice0" : {
+				"volume" : -20,
+				"portamento" : 0,
+				"oscType" : "square",
+				"filter" : {
+					"Q" : 2,
+					"type" : "lowpass",
+					"rolloff" : -12
+				},
+				"envelope" : {
+					"attack" : 0.01,
+					"decay" : 1,
+					"sustain" : 0,
+					"release" : 0.4
+				},
+				"filterEnvelope" : {
+					"attack" : 0.001,
+					"decay" : 0.01,
+					"sustain" : 0.35,
+					"release" : 1,
+					"min" : 20,
+					"max" : 8000
+				}
+			},
+			"voice1" : {
+				"volume" : -10,
+				"portamento" : 0,
+				"oscType" : "sine",
+				"filter" : {
+					"Q" : 2,
+					"type" : "lowpass",
+					"rolloff" : -12
+				},
+				"envelope" : {
+					"attack" : 0.25,
+					"decay" : 4,
+					"sustain" : 0,
+					"release" : 0.8
+				},
+				"filterEnvelope" : {
+					"attack" : 0.03,
+					"decay" : 0.25,
+					"sustain" : 0.7,
+					"release" : 1,
+					"min" : 1000,
+					"max" : 2500
+				}
+			}
+		},
+		"Rego" : {
+			"vibratoAmount" : 0.5,
+			"vibratoRate" : 5,
+			"vibratoDelay" : 1,
+			"portamento" : 0.1,
+			"voiceRatio" : 1.005,
+			"voice0" : {
+				"volume" : -10,
+				"portamento" : 0,
+				"oscType" : "sawtooth",
+				"filter" : {
+					"Q" : 1,
+					"type" : "lowpass",
+					"rolloff" : -24
+				},
+				"envelope" : {
+					"attack" : 0.01,
+					"decay" : 0.25,
+					"sustain" : 0.4,
+					"release" : 1.2
+				},
+				"filterEnvelope" : {
+					"attack" : 0.001,
+					"decay" : 0.05,
+					"sustain" : 0.3,
+					"release" : 2,
+					"min" : 100,
+					"max" : 10000
+				}
+			},
+			"voice1" : {
+				"volume" : -100,
+				"portamento" : 0,
+				"oscType" : "sawtooth",
+				"filter" : {
+					"Q" : 2,
+					"type" : "bandpass",
+					"rolloff" : -12
+				},
+				"envelope" : {
+					"attack" : 0.25,
+					"decay" : 4,
+					"sustain" : 0.1,
+					"release" : 0.8
+				},
+				"filterEnvelope" : {
+					"attack" : 0.05,
+					"decay" : 0.05,
+					"sustain" : 0.7,
+					"release" : 2,
+					"min" : 5000,
+					"max" : 2000
+				}
+			}
+		}
+	};
+
+	/**
+	 *  augment the prototype to include setPreset
+	 */
+	Tone.DuoSynth.prototype.setPreset = function(presetName){
+		presetName = this.defaultArg(presetName, "CasioPiano");
+		//look up if it exists
+		//TODO
+		//set it
+		this.set(Tone.DuoSynth.preset[presetName]);
+	};
+
+
+	return Tone.DuoSynth.preset;
+});
\ No newline at end of file
diff --git a/examples/duoSynth.html b/examples/duoSynth.html
new file mode 100644
index 00000000..3696ba96
--- /dev/null
+++ b/examples/duoSynth.html
@@ -0,0 +1,224 @@
+<html>
+<head>
+	<title>DUOSYNTH</title>
+
+	<meta name="viewport" content="width=device-width, initial-scale=0.5">
+
+	<script type="text/javascript" src="../deps/jquery.min.js"></script>
+	<script type="text/javascript" src="../deps/jquery-ui.js"></script>
+	<script type="text/javascript" src="../deps/jquery.ui.touch-punch.js"></script>
+	<script type="text/javascript" src="../Tone.js"></script>
+	<script type="text/javascript" src="../Tone/instrument/DuoSynth.js"></script>
+	<script type="text/javascript" src="../Tone/instrument/preset/DuoSynth.preset.js"></script>
+	<script type="text/javascript" src="./Widgets.js"></script>
+	<script type="text/javascript" src="./ExampleList.js"></script>
+	<link rel="stylesheet" type="text/css" href="./style/widgets.css">
+	<link rel="stylesheet" type="text/css" href="./style/jquery-ui.css">
+	<script type="text/javascript" src="../deps/qwerty-hancock.js"></script>
+
+</head>
+<body>
+
+	<div id="Container">
+		<div id="Explanation">
+			Monophonic Synthesizer
+			<br>
+			<br>
+			MonoSynth is one a few built-in synthesizers. It is composed simply of one oscillator, 
+			a filter and two envelopes (on amplitude and filter). 
+		</div>
+		<div id="Content">
+			<div id="tabs">
+			  <ul>
+			    <li><a href="#envelope0">Osc 0</a></li>
+			    <li><a href="#filter0">Filt 0</a></li>
+			    <li><a href="#envelope1">Osc 1</a></li>
+			    <li><a href="#filter1">Filt 1</a></li>
+			    <li><a href="#presets">Presets</a></li>
+			  </ul>
+			  <div id="envelope0">
+			  </div>
+			  <div id="filter0">
+			  </div>
+			  <div id="envelope1">
+			  </div>
+			  <div id="filter1">
+			  </div>
+			  <div id="presets">
+			  </div>
+			</div>
+
+
+		</div>
+	</div>
+
+	<script type="text/javascript">
+
+		/* globals Tone, GUI, QwertyHancock */
+			
+		var synth = new Tone.DuoSynth();
+		synth.setVolume(-10);
+		synth.toMaster();
+
+		// GUI //
+
+		new GUI.TopBar(Tone);
+		// new GUI.StartButton(Tone.startMobile);
+
+		$("#tabs").tabs();
+
+		var content = $("#Content");
+		var envelope0 = $("#envelope0");
+		var envelope1 = $("#envelope1");
+		var filter0 = $("#filter0");
+		var filter1 = $("#filter1");
+		var presets = $("#presets");
+
+		//osc 0
+		var ampEnv0 = new GUI.Envelope(envelope0, synth.voice0.envelope, "amplitude");
+		var osc0 = new GUI.Oscillator(envelope0, synth.voice0.oscillator, "oscillator");
+		var osc0Vol = new GUI.Slider(envelope0, function(val){
+			var vol = synth.gainToDb(val);
+			synth.voice0.setVolume(vol);
+			return vol;
+		}, 1, "volume", "db");
+
+		//osc 1
+		var ampEnv1 = new GUI.Envelope(envelope1, synth.voice1.envelope, "amplitude");
+		var osc1 = new GUI.Oscillator(envelope1, synth.voice1.oscillator, "oscillator");
+		var osc1Vol = new GUI.Slider(envelope1, function(val){
+			var vol = synth.gainToDb(val);
+			synth.voice1.setVolume(vol);
+			return vol;
+		}, 1, "volume", "db");
+
+		//filt 0
+		var min = 20;
+		var max = 20000;
+		var filtEnv0 =new GUI.Envelope(filter0, synth.voice0.filterEnvelope, "filter");
+		var minFilFreq0 = new GUI.Slider(filter0, function(val){
+			var freq = Math.pow(val, 2);
+			var scaled = freq * (max - min) + min;
+			synth.voice0.filterEnvelope.min = scaled;
+			return scaled;
+		}, min, "start freq", "hz");
+		var maxFilFreq0 = new GUI.Slider(filter0, function(val){
+			var freq = Math.pow(val, 2);
+			var scaled = freq * (max - min) + min;
+			synth.voice0.filterEnvelope.max = scaled;
+			return scaled;
+		}, min, "end freq", "hz");
+
+		//filt 1
+		var filtEnv1 =new GUI.Envelope(filter1, synth.voice1.filterEnvelope, "filter");
+		var minFilFreq1 = new GUI.Slider(filter1, function(val){
+			var freq = Math.pow(val, 2);
+			var scaled = freq * (max - min) + min;
+			synth.voice1.filterEnvelope.min = scaled;
+			return scaled;
+		}, min, "start freq", "hz");
+		var maxFilFreq1 = new GUI.Slider(filter1, function(val){
+			var freq = Math.pow(val, 2);
+			var scaled = freq * (max - min) + min;
+			synth.voice1.filterEnvelope.max = scaled;
+			return scaled;
+		}, min, "end freq", "hz");
+
+
+
+		
+		//presets
+		var allPresets = [];
+		for (var name in Tone.DuoSynth.preset){
+			allPresets.push(name);
+		}
+		new GUI.DropDown(presets, allPresets, function(name){
+			setPreset(name);
+		});
+
+		//keyboard
+		$("<div>", {"id" : "Keyboard"}).appendTo(content);
+		var keyboard = new QwertyHancock({
+			id: "Keyboard",
+			width: 400,
+			height: 75,
+			octaves: 2,
+			startNote: "A3",
+			whiteNotesColour: "white",
+			blackNotesColour: "black",
+			hoverColour: "#f3e939"
+		});
+		keyboard.keyDown = function(note, freq){
+			synth.triggerAttack(freq);
+		};
+		keyboard.keyUp = function(){
+			synth.triggerRelease();
+		};
+
+		function setPreset(name){
+			synth.setPreset(name);
+			ampEnv0.render();
+			ampEnv1.render();
+			osc0.render();
+			osc0Vol.render(synth.dbToGain(synth.voice0.output.gain.value));
+			osc1.render();
+			osc1Vol.render(synth.dbToGain(synth.voice1.output.gain.value));
+			filtEnv0.render();
+			var minVal0 = Math.pow(Math.max((synth.voice0.filterEnvelope.min - min) / (max - min), 0), 0.5);
+			minFilFreq0.render(minVal0);
+			var maxVal0 = Math.pow(Math.max((synth.voice0.filterEnvelope.max - min) / (max - min), 0), 0.5);
+			maxFilFreq0.render(maxVal0);
+			filtEnv1.render();
+			var minVal1 = Math.pow(Math.max((synth.voice1.filterEnvelope.min - min) / (max - min), 0), 0.5);
+			minFilFreq1.render(minVal1);
+			var maxVal1 = Math.pow(Math.max((synth.voice1.filterEnvelope.max - min) / (max - min), 0), 0.5);
+			maxFilFreq1.render(maxVal1);
+			
+			// osc1Ratio.render(synth.)
+		}
+
+		setPreset("Rego");
+		
+	</script>
+
+	<style type="text/css">
+	#Content {
+		width: 400px;
+		height: 400px;
+	}
+
+	#tabs {
+		height: 300px;
+	}
+
+	.Slider {
+		width: 80%;
+		margin-left: 10%;
+		margin-top: 10px;
+	}
+
+	.Oscillator {
+		width: 80%;
+		margin-left: 10%;
+		margin-top: 10px;
+	}
+
+	#envelope1 .Oscillator {
+		margin-top: 10px;
+	}
+
+	.Envelope {
+		margin: auto;
+	}
+
+	#Keyboard {
+		background-color: black;
+	}
+
+	#presets .DropDown {
+		margin: auto;
+		margin-top: 50px;
+	}
+	</style>
+</body>
+</html>
\ No newline at end of file