diff --git a/include/app/ModuleWidget.hpp b/include/app/ModuleWidget.hpp
index e858ec3b..3c61df83 100644
--- a/include/app/ModuleWidget.hpp
+++ b/include/app/ModuleWidget.hpp
@@ -24,8 +24,13 @@ struct ModuleWidget : OpaqueWidget {
 	math::Vec dragPos;
 	math::Vec oldPos;
 
-	ModuleWidget(Module *module);
+	ModuleWidget() {}
+	DEPRECATED ModuleWidget(Module *module) {
+		setModule(module);
+	}
 	~ModuleWidget();
+
+	void setModule(Module *module);
 	/** Convenience functions for adding special widgets (calls addChild()) */
 	void addInput(PortWidget *input);
 	void addOutput(PortWidget *output);
diff --git a/include/engine/Port.hpp b/include/engine/Port.hpp
index bd8fe168..4c563a45 100644
--- a/include/engine/Port.hpp
+++ b/include/engine/Port.hpp
@@ -33,6 +33,18 @@ struct Port {
 	void setVoltage(float voltage, int channel = 0) {
 		values[channel] = voltage;
 	}
+
+	void setChannels(int channels) {
+		// Set higher channel values to 0
+		for (int c = channels; c < this->channels; c++) {
+			values[c] = 0.f;
+		}
+		this->channels = channels;
+	}
+
+	int getChannels() {
+		return channels;
+	}
 };
 
 
diff --git a/src/Core/AudioInterface.cpp b/src/Core/AudioInterface.cpp
index d85594f9..181dba57 100644
--- a/src/Core/AudioInterface.cpp
+++ b/src/Core/AudioInterface.cpp
@@ -237,7 +237,8 @@ void AudioInterface::step() {
 
 
 struct AudioInterfaceWidget : ModuleWidget {
-	AudioInterfaceWidget(AudioInterface *module) : ModuleWidget(module) {
+	AudioInterfaceWidget(AudioInterface *module) {
+		setModule(module);
 		setPanel(SVG::load(asset::system("res/Core/AudioInterface.svg")));
 
 		addChild(createWidget<ScrewSilver>(Vec(RACK_GRID_WIDTH, 0)));
diff --git a/src/Core/Blank.cpp b/src/Core/Blank.cpp
index fc0a1353..6a2ce965 100644
--- a/src/Core/Blank.cpp
+++ b/src/Core/Blank.cpp
@@ -83,7 +83,8 @@ struct BlankWidget : ModuleWidget {
 	Widget *bottomRightScrew;
 	Widget *rightHandle;
 
-	BlankWidget(Module *module) : ModuleWidget(module) {
+	BlankWidget(Module *module) {
+		setModule(module);
 		box.size = Vec(RACK_GRID_WIDTH * 10, RACK_GRID_HEIGHT);
 
 		panel = new BlankPanel;
diff --git a/src/Core/CV_MIDI.cpp b/src/Core/CV_MIDI.cpp
index 2262a035..f4ff89a4 100644
--- a/src/Core/CV_MIDI.cpp
+++ b/src/Core/CV_MIDI.cpp
@@ -235,7 +235,7 @@ struct CV_MIDI : Module {
 	}
 
 	void step() override {
-		for (int c = 0; c < inputs[PITCH_INPUT].channels; c++) {
+		for (int c = 0; c < inputs[PITCH_INPUT].getChannels(); c++) {
 			int vel = (int) std::round(inputs[VEL_INPUT].normalize(10.f * 100 / 127, c) / 10.f * 127);
 			vel = clamp(vel, 0, 127);
 			midiOutput.setVel(vel, c);
@@ -286,7 +286,8 @@ struct CV_MIDI : Module {
 
 
 struct CV_MIDIWidget : ModuleWidget {
-	CV_MIDIWidget(CV_MIDI *module) : ModuleWidget(module) {
+	CV_MIDIWidget(CV_MIDI *module) {
+		setModule(module);
 		setPanel(SVG::load(asset::system("res/Core/CV-MIDI.svg")));
 
 		addChild(createWidget<ScrewSilver>(Vec(RACK_GRID_WIDTH, 0)));
diff --git a/src/Core/MIDICCToCVInterface.cpp b/src/Core/MIDICCToCVInterface.cpp
index 93753c78..6769be9d 100644
--- a/src/Core/MIDICCToCVInterface.cpp
+++ b/src/Core/MIDICCToCVInterface.cpp
@@ -220,7 +220,8 @@ struct MidiCcWidget : Grid16MidiWidget {
 
 
 struct MIDICCToCVInterfaceWidget : ModuleWidget {
-	MIDICCToCVInterfaceWidget(MIDICCToCVInterface *module) : ModuleWidget(module) {
+	MIDICCToCVInterfaceWidget(MIDICCToCVInterface *module) {
+		setModule(module);
 		setPanel(SVG::load(asset::system("res/Core/MIDICCToCVInterface.svg")));
 
 		addChild(createWidget<ScrewSilver>(Vec(RACK_GRID_WIDTH, 0)));
diff --git a/src/Core/MIDIToCVInterface.cpp b/src/Core/MIDIToCVInterface.cpp
index c37f2a05..1adc7399 100644
--- a/src/Core/MIDIToCVInterface.cpp
+++ b/src/Core/MIDIToCVInterface.cpp
@@ -259,7 +259,8 @@ struct MIDIToCVInterface : Module {
 
 
 struct MIDIToCVInterfaceWidget : ModuleWidget {
-	MIDIToCVInterfaceWidget(MIDIToCVInterface *module) : ModuleWidget(module) {
+	MIDIToCVInterfaceWidget(MIDIToCVInterface *module) {
+		setModule(module);
 		setPanel(SVG::load(asset::system("res/Core/MIDIToCVInterface.svg")));
 
 		addChild(createWidget<ScrewSilver>(Vec(RACK_GRID_WIDTH, 0)));
diff --git a/src/Core/MIDITriggerToCVInterface.cpp b/src/Core/MIDITriggerToCVInterface.cpp
index ca9716d3..0a77839c 100644
--- a/src/Core/MIDITriggerToCVInterface.cpp
+++ b/src/Core/MIDITriggerToCVInterface.cpp
@@ -207,7 +207,8 @@ struct MidiTrigWidget : Grid16MidiWidget {
 
 
 struct MIDITriggerToCVInterfaceWidget : ModuleWidget {
-	MIDITriggerToCVInterfaceWidget(MIDITriggerToCVInterface *module) : ModuleWidget(module) {
+	MIDITriggerToCVInterfaceWidget(MIDITriggerToCVInterface *module) {
+		setModule(module);
 		setPanel(SVG::load(asset::system("res/Core/MIDITriggerToCVInterface.svg")));
 
 		addChild(createWidget<ScrewSilver>(Vec(RACK_GRID_WIDTH, 0)));
diff --git a/src/Core/Notes.cpp b/src/Core/Notes.cpp
index ae50e5f5..a4d2d1bb 100644
--- a/src/Core/Notes.cpp
+++ b/src/Core/Notes.cpp
@@ -7,7 +7,8 @@ using namespace rack;
 struct NotesWidget : ModuleWidget {
 	TextField *textField;
 
-	NotesWidget(Module *module) : ModuleWidget(module) {
+	NotesWidget(Module *module) {
+		setModule(module);
 		setPanel(SVG::load(asset::system("res/Core/Notes.svg")));
 
 		addChild(createWidget<ScrewSilver>(Vec(RACK_GRID_WIDTH, 0)));
diff --git a/src/Core/QuadMIDIToCVInterface.cpp b/src/Core/QuadMIDIToCVInterface.cpp
index f57daecb..d25ca8e9 100644
--- a/src/Core/QuadMIDIToCVInterface.cpp
+++ b/src/Core/QuadMIDIToCVInterface.cpp
@@ -302,7 +302,8 @@ struct QuadMIDIToCVInterface : Module {
 
 
 struct QuadMIDIToCVInterfaceWidget : ModuleWidget {
-	QuadMIDIToCVInterfaceWidget(QuadMIDIToCVInterface *module) : ModuleWidget(module) {
+	QuadMIDIToCVInterfaceWidget(QuadMIDIToCVInterface *module) {
+		setModule(module);
 		setPanel(SVG::load(asset::system("res/Core/QuadMIDIToCVInterface.svg")));
 
 		addChild(createWidget<ScrewSilver>(Vec(RACK_GRID_WIDTH, 0)));
diff --git a/src/app/ModuleWidget.cpp b/src/app/ModuleWidget.cpp
index e259c048..8bd5253b 100644
--- a/src/app/ModuleWidget.cpp
+++ b/src/app/ModuleWidget.cpp
@@ -15,16 +15,16 @@
 namespace rack {
 
 
-ModuleWidget::ModuleWidget(Module *module) {
-	this->module = module;
-}
-
 ModuleWidget::~ModuleWidget() {
 	if (module) {
 		delete module;
 	}
 }
 
+void ModuleWidget::setModule(Module *module) {
+	this->module = module;
+}
+
 void ModuleWidget::addInput(PortWidget *input) {
 	assert(input->type == PortWidget::INPUT);
 	inputs.push_back(input);
diff --git a/src/app/Scene.cpp b/src/app/Scene.cpp
index 7e40a62e..948be49f 100644
--- a/src/app/Scene.cpp
+++ b/src/app/Scene.cpp
@@ -53,7 +53,9 @@ void Scene::step() {
 	zoomWidget->box.size = rackWidget->box.size.mult(zoomWidget->zoom);
 	moduleBrowser->box.size = box.size;
 
-	zoomWidget->setZoom(settings::zoom);
+	// Set zoom every few frames
+	if (app()->window->frame % 10 == 0)
+		zoomWidget->setZoom(settings::zoom);
 
 	// Request latest version from server
 	if (!devMode && checkVersion && !checkedVersion) {