diff --git a/src/ADSR.cpp b/src/ADSR.cpp
index 45998c7..be7d196 100644
--- a/src/ADSR.cpp
+++ b/src/ADSR.cpp
@@ -213,6 +213,8 @@ struct ADSRDisplay : LedDisplay {
 			float decay = std::pow(decayLambda, -power);
 			float release = std::pow(releaseLambda, -power);
 			float totalLambda = attack + decay + release;
+			if (totalLambda == 0.f)
+				return;
 
 			Rect r = box.zeroPos().shrink(Vec(4, 5));
 			Vec p0 = r.getBottomLeft();
diff --git a/src/Sum.cpp b/src/Sum.cpp
index 376e599..06566e9 100644
--- a/src/Sum.cpp
+++ b/src/Sum.cpp
@@ -126,7 +126,7 @@ struct SumWidget : ModuleWidget {
 
 		addOutput(createOutputCentered<PJ301MPort>(mm2px(Vec(7.62, 113.066)), module, Sum::MONO_OUTPUT));
 
-		SumDisplay* display = createWidget<SumDisplay>(mm2px(Vec(0.0, 12.834)));
+		SumDisplay* display = createWidget<SumDisplay>(mm2px(Vec(0.0, 13.039)));
 		display->box.size = mm2px(Vec(15.241, 36.981));
 		display->module = module;
 		addChild(display);
diff --git a/src/VCO.cpp b/src/VCO.cpp
index e557c21..9c3040d 100644
--- a/src/VCO.cpp
+++ b/src/VCO.cpp
@@ -58,7 +58,7 @@ struct VoltageControlledOscillator {
 
 	void process(float deltaTime, T syncValue) {
 		// Advance phase
-		T deltaPhase = simd::clamp(freq * deltaTime, 1e-6f, 0.35f);
+		T deltaPhase = simd::clamp(freq * deltaTime, 0.f, 0.35f);
 		if (soft) {
 			// Reverse direction
 			deltaPhase *= syncDirection;
@@ -320,7 +320,7 @@ struct VCO : Module {
 			oscillator.soft = soft;
 
 			// Get frequency
-			float_4 pitch = freqParam / 12.f + inputs[PITCH_INPUT].getPolyVoltageSimd<float_4>(c);
+			float_4 pitch = freqParam + inputs[PITCH_INPUT].getPolyVoltageSimd<float_4>(c);
 			float_4 freq;
 			if (!linear) {
 				pitch += inputs[FM_INPUT].getPolyVoltageSimd<float_4>(c) * fmParam;
diff --git a/src/Viz.cpp b/src/Viz.cpp
index cd304a7..99f82e1 100644
--- a/src/Viz.cpp
+++ b/src/Viz.cpp
@@ -104,7 +104,7 @@ struct VizWidget : ModuleWidget {
 
 		addInput(createInputCentered<PJ301MPort>(mm2px(Vec(7.62, 113.115)), module, Viz::POLY_INPUT));
 
-		VizDisplay* display = createWidget<VizDisplay>(mm2px(Vec(0.003, 13.039)));
+		VizDisplay* display = createWidget<VizDisplay>(mm2px(Vec(0.0, 13.039)));
 		display->box.size = mm2px(Vec(15.237, 89.344));
 		display->module = module;
 		addChild(display);
diff --git a/src/WTVCO.cpp b/src/WTVCO.cpp
index d0a9068..69fa019 100644
--- a/src/WTVCO.cpp
+++ b/src/WTVCO.cpp
@@ -243,9 +243,9 @@ struct WTVCO : Module {
 		// Light
 		if (lightDivider.process()) {
 			if (channels == 1) {
-				float b = 1.f - phases[0][0];
-				lights[PHASE_LIGHT + 0].setSmoothBrightness(b, args.sampleTime * lightDivider.getDivision());
-				lights[PHASE_LIGHT + 1].setBrightness(0.f);
+				float b = std::sin(2 * M_PI * phases[0][0]);
+				lights[PHASE_LIGHT + 0].setSmoothBrightness(-b, args.sampleTime * lightDivider.getDivision());
+				lights[PHASE_LIGHT + 1].setSmoothBrightness(b, args.sampleTime * lightDivider.getDivision());
 				lights[PHASE_LIGHT + 2].setBrightness(0.f);
 			}
 			else {