diff --git a/.gitignore b/.gitignore
index 8e77f61a..d22540ef 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,5 +1,6 @@
 /Rack
 /Rack.exe
+/libRack.a
 /autosave.json
 /settings.json
 /plugins
diff --git a/LICENSE-dist.txt b/LICENSE-dist.txt
index 62b28280..7260a68e 100644
--- a/LICENSE-dist.txt
+++ b/LICENSE-dist.txt
@@ -180,17 +180,34 @@ OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 THE SOFTWARE.
 
 
-# portaudio
+# RtAudio
 
-PortAudio Portable Real-Time Audio Library
-Copyright (c) 1999-2011 Ross Bencina and Phil Burk
+RtAudio: a set of realtime audio i/o C++ classes
+Copyright (c) 2001-2017 Gary P. Scavone
 
-Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:
+Permission is hereby granted, free of charge, to any person
+obtaining a copy of this software and associated documentation files
+(the "Software"), to deal in the Software without restriction,
+including without limitation the rights to use, copy, modify, merge,
+publish, distribute, sublicense, and/or sell copies of the Software,
+and to permit persons to whom the Software is furnished to do so,
+subject to the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
 
-    The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.
+Any person wishing to distribute modifications to the Software is
+asked to send the modifications to the original developer so that
+they can be incorporated into the canonical version.  This is,
+however, not a binding provision of this license.
 
-THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
-IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
+IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR
+ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF
+CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 
 
 # RtMidi
diff --git a/Makefile b/Makefile
index c504f990..62e32b68 100644
--- a/Makefile
+++ b/Makefile
@@ -69,8 +69,14 @@ ifeq ($(ARCH), win)
 	env PATH=dep/bin:/mingw64/bin gdb -ex run ./Rack
 endif
 
+perf: $(TARGET)
+ifeq ($(ARCH), lin)
+	LD_LIBRARY_PATH=dep/lib perf record --call-graph dwarf ./Rack
+endif
+
 
 clean:
+	rm -fv libRack.a
 	rm -rfv $(TARGET) build dist
 
 # For Windows resources
@@ -106,7 +112,6 @@ ifeq ($(ARCH), mac)
 	cp dep/lib/libsamplerate.0.dylib $(BUNDLE)/Contents/MacOS/
 	cp dep/lib/libcurl.4.dylib $(BUNDLE)/Contents/MacOS/
 	cp dep/lib/libzip.5.dylib $(BUNDLE)/Contents/MacOS/
-	cp dep/lib/libportaudio.2.dylib $(BUNDLE)/Contents/MacOS/
 	cp dep/lib/librtmidi.4.dylib $(BUNDLE)/Contents/MacOS/
 	cp dep/lib/librtaudio.dylib $(BUNDLE)/Contents/MacOS/
 
@@ -116,7 +121,6 @@ ifeq ($(ARCH), mac)
 	install_name_tool -change $(PWD)/dep/lib/libsamplerate.0.dylib @executable_path/libsamplerate.0.dylib $(BUNDLE)/Contents/MacOS/Rack
 	install_name_tool -change $(PWD)/dep/lib/libcurl.4.dylib @executable_path/libcurl.4.dylib $(BUNDLE)/Contents/MacOS/Rack
 	install_name_tool -change $(PWD)/dep/lib/libzip.5.dylib @executable_path/libzip.5.dylib $(BUNDLE)/Contents/MacOS/Rack
-	install_name_tool -change $(PWD)/dep/lib/libportaudio.2.dylib @executable_path/libportaudio.2.dylib $(BUNDLE)/Contents/MacOS/Rack
 	install_name_tool -change $(PWD)/dep/lib/librtmidi.4.dylib @executable_path/librtmidi.4.dylib $(BUNDLE)/Contents/MacOS/Rack
 	install_name_tool -change librtaudio.dylib @executable_path/librtaudio.dylib $(BUNDLE)/Contents/MacOS/Rack
 
diff --git a/README.md b/README.md
index 40204931..6f9d0e72 100644
--- a/README.md
+++ b/README.md
@@ -51,6 +51,8 @@ You may use make's `-j$(nproc)` flag to parallelize builds across all your CPU c
 
 	make dep
 
+You may use `make dep RTAUDIO_ALL_APIS=1` to attempt to build with all audio driver APIs enabled for your operating system.
+
 You should see a message that all dependencies built successfully.
 
 Build Rack.
diff --git a/dep/Makefile b/dep/Makefile
index 6f43c97b..9038f68e 100755
--- a/dep/Makefile
+++ b/dep/Makefile
@@ -86,13 +86,12 @@ $(glew):
 	$(MAKE) -C glew-2.1.0 GLEW_DEST="$(LOCAL)" LIBDIR="$(LOCAL)/lib" install
 
 $(glfw):
-	$(WGET) https://github.com/glfw/glfw/releases/download/3.2.1/glfw-3.2.1.zip
-	$(UNZIP) glfw-3.2.1.zip
-	cd glfw-3.2.1 && $(CMAKE) . \
+	git clone https://github.com/glfw/glfw.git
+	cd glfw && $(CMAKE) . \
 		-DCMAKE_INSTALL_PREFIX="$(LOCAL)" -DBUILD_SHARED_LIBS=ON \
-		-DGLFW_USE_CHDIR=OFF -DGLFW_USE_MENUBAR=ON -DGLFW_USE_RETINA=ON
-	$(MAKE) -C glfw-3.2.1
-	$(MAKE) -C glfw-3.2.1 install
+		-DGLFW_COCOA_CHDIR_RESOURCES=OFF -DGLFW_COCOA_MENUBAR=ON -DGLFW_COCOA_RETINA_FRAMEBUFFER=ON
+	$(MAKE) -C glfw
+	$(MAKE) -C glfw install
 ifeq ($(ARCH),win)
 	# Not sure why the GLFW build system puts a .dll in the lib directory
 	mv "$(LOCAL)/lib/glfw3.dll" "$(LOCAL)/bin/"
diff --git a/include/dsp/filter.hpp b/include/dsp/filter.hpp
index 35098ecf..a29785bd 100644
--- a/include/dsp/filter.hpp
+++ b/include/dsp/filter.hpp
@@ -51,6 +51,11 @@ struct SlewLimiter {
 	float rise = 1.0;
 	float fall = 1.0;
 	float out = 0.0;
+
+	void setRiseFall(float _rise, float _fall) {
+		rise = _rise;
+		fall = _fall;
+	}
 	float process(float in) {
 		float delta = clampf(in - out, -fall, rise);
 		out += delta;
diff --git a/include/widgets.hpp b/include/widgets.hpp
index b26245af..454c9c43 100644
--- a/include/widgets.hpp
+++ b/include/widgets.hpp
@@ -295,7 +295,7 @@ struct Label : Widget {
 /** Deletes itself from parent when clicked */
 struct MenuOverlay : OpaqueWidget {
 	void step() override;
-	void onDragDrop(EventDragDrop &e) override;
+	void onMouseDown(EventMouseDown &e) override;
 	void onHoverKey(EventHoverKey &e) override;
 };
 
diff --git a/src/app/ModuleWidget.cpp b/src/app/ModuleWidget.cpp
index 975cf835..8c04a89b 100644
--- a/src/app/ModuleWidget.cpp
+++ b/src/app/ModuleWidget.cpp
@@ -60,8 +60,11 @@ void ModuleWidget::setPanel(std::shared_ptr<SVG> svg) {
 json_t *ModuleWidget::toJson() {
 	json_t *rootJ = json_object();
 
-	// manufacturer
+	// plugin
 	json_object_set_new(rootJ, "plugin", json_string(model->plugin->slug.c_str()));
+	// version (of plugin)
+	if (!model->plugin->version.empty())
+		json_object_set_new(rootJ, "version", json_string(model->plugin->version.c_str()));
 	// model
 	json_object_set_new(rootJ, "model", json_string(model->slug.c_str()));
 	// pos
diff --git a/src/app/SVGSlider.cpp b/src/app/SVGSlider.cpp
index 5d0beb60..b65bcd30 100644
--- a/src/app/SVGSlider.cpp
+++ b/src/app/SVGSlider.cpp
@@ -23,7 +23,7 @@ void SVGSlider::step() {
 
 void SVGSlider::onChange(EventChange &e) {
 	dirty = true;
-	ParamWidget::onChange(e);
+	Knob::onChange(e);
 }
 
 
diff --git a/src/app/Toolbar.cpp b/src/app/Toolbar.cpp
index cde1221b..4414b2ee 100644
--- a/src/app/Toolbar.cpp
+++ b/src/app/Toolbar.cpp
@@ -151,12 +151,13 @@ Toolbar::Toolbar() {
 		struct ZoomSlider : Slider {
 			void onAction(EventAction &e) override {
 				Slider::onAction(e);
-				gRackScene->zoomWidget->setZoom(value / 100.0);
+				gRackScene->zoomWidget->setZoom(roundf(value) / 100.0);
 			}
 		};
 		zoomSlider = new ZoomSlider();
 		zoomSlider->box.pos = Vec(xPos, margin);
 		zoomSlider->box.size.x = 150;
+		zoomSlider->precision = 0;
 		zoomSlider->label = "Zoom";
 		zoomSlider->unit = "%";
 		zoomSlider->setLimits(25.0, 200.0);
diff --git a/src/core/MidiTriggerToCV.cpp b/src/core/MidiTriggerToCV.cpp
index 4bb60020..ec0f11db 100644
--- a/src/core/MidiTriggerToCV.cpp
+++ b/src/core/MidiTriggerToCV.cpp
@@ -110,7 +110,7 @@ void MIDITriggerToCVInterface::processMidi(std::vector<unsigned char> msg) {
 	if (status == 0x8) { // note off
 		for (int i = 0; i < NUM_OUTPUTS; i++) {
 			if (data1 == trigger[i].num) {
-				trigger[i].val = data2;
+				trigger[i].val = 0;
 			}
 		}
 		return;
diff --git a/src/gui.cpp b/src/gui.cpp
index 4aec9b93..b74a6988 100644
--- a/src/gui.cpp
+++ b/src/gui.cpp
@@ -445,11 +445,9 @@ void guiRun() {
 		}
 
 		// Get framebuffer size
-		int width, height;
-		glfwGetFramebufferSize(gWindow, &width, &height);
-		int windowWidth, windowHeight;
-		glfwGetWindowSize(gWindow, &windowWidth, &windowHeight);
-		float pixelRatio = (float)width / windowWidth;
+		float pixelRatio;
+		glfwGetWindowContentScale(gWindow, &pixelRatio, NULL);
+		pixelRatio = roundf(pixelRatio);
 		if (pixelRatio != gPixelRatio) {
 			EventZoom eZoom;
 			gScene->onZoom(eZoom);
diff --git a/src/plugin.cpp b/src/plugin.cpp
index ca873ed0..d63b962f 100644
--- a/src/plugin.cpp
+++ b/src/plugin.cpp
@@ -144,6 +144,16 @@ static int loadPlugin(std::string path) {
 	plugin->handle = handle;
 	initCallback(plugin);
 
+	// Reject plugin if slug already exists
+	for (Plugin *p : gPlugins) {
+		if (plugin->slug == p->slug) {
+			warn("Plugin \"%s\" is already loaded, not attempting to load it again");
+			// TODO
+			// Fix memory leak with `plugin` here
+			return -1;
+		}
+	}
+
 	// Add plugin to list
 	gPlugins.push_back(plugin);
 	info("Loaded plugin %s", libraryFilename.c_str());
diff --git a/src/widgets/MenuOverlay.cpp b/src/widgets/MenuOverlay.cpp
index efecef8c..85665b66 100644
--- a/src/widgets/MenuOverlay.cpp
+++ b/src/widgets/MenuOverlay.cpp
@@ -13,10 +13,12 @@ void MenuOverlay::step() {
 	}
 }
 
-void MenuOverlay::onDragDrop(EventDragDrop &e) {
-	if (e.origin == this) {
+void MenuOverlay::onMouseDown(EventMouseDown &e) {
+	Widget::onMouseDown(e);
+	if (!e.consumed) {
 		// deletes `this`
 		gScene->setOverlay(NULL);
+		e.consumed = true;
 	}
 }
 
diff --git a/src/widgets/SVGWidget.cpp b/src/widgets/SVGWidget.cpp
index 52b503e5..10138fc2 100644
--- a/src/widgets/SVGWidget.cpp
+++ b/src/widgets/SVGWidget.cpp
@@ -59,16 +59,19 @@ static void drawSVG(NVGcontext *vg, NSVGimage *svg) {
 	for (NSVGshape *shape = svg->shapes; shape; shape = shape->next, shapeIndex++) {
 		DEBUG_ONLY(printf("	new shape: %d id \"%s\", fillrule %d, from (%f, %f) to (%f, %f)\n", shapeIndex, shape->id, shape->fillRule, shape->bounds[0], shape->bounds[1], shape->bounds[2], shape->bounds[3]);)
 
+		// Visibility
 		if (!(shape->flags & NSVG_FLAGS_VISIBLE))
 			continue;
 
 		nvgSave(vg);
 
+		// Opacity
 		if (shape->opacity < 1.0)
 			nvgGlobalAlpha(vg, shape->opacity);
 
 		// Build path
 		nvgBeginPath(vg);
+
 		// Iterate path linked list
 		for (NSVGpath *path = shape->paths; path; path = path->next) {
 			DEBUG_ONLY(printf("		new path: %d points, %s, from (%f, %f) to (%f, %f)\n", path->npts, path->closed ? "closed" : "open", path->bounds[0], path->bounds[1], path->bounds[2], path->bounds[3]);)
@@ -81,6 +84,7 @@ static void drawSVG(NVGcontext *vg, NSVGimage *svg) {
 				DEBUG_ONLY(printf("			bezier (%f, %f) to (%f, %f)\n", p[-2], p[-1], p[4], p[5]);)
 			}
 
+			// Close path
 			if (path->closed)
 				nvgClosePath(vg);
 
@@ -161,11 +165,12 @@ static void drawSVG(NVGcontext *vg, NSVGimage *svg) {
 		}
 
 		// Stroke shape
-		nvgStrokeWidth(vg, shape->strokeWidth);
-		// strokeDashOffset, strokeDashArray, strokeDashCount not yet supported
-		// strokeLineJoin, strokeLineCap not yet supported
-
 		if (shape->stroke.type) {
+			nvgStrokeWidth(vg, shape->strokeWidth);
+			// strokeDashOffset, strokeDashArray, strokeDashCount not yet supported
+			nvgLineCap(vg, (NVGlineCap) shape->strokeLineCap);
+			nvgLineJoin(vg, (int) shape->strokeLineJoin);
+
 			switch (shape->stroke.type) {
 				case NSVG_PAINT_COLOR: {
 					NVGcolor color = getNVGColor(shape->stroke.color);