diff --git a/src/app/ModuleWidget.cpp b/src/app/ModuleWidget.cpp
index a076d5f2..91c4b0fe 100644
--- a/src/app/ModuleWidget.cpp
+++ b/src/app/ModuleWidget.cpp
@@ -13,6 +13,15 @@
 #endif // USE_VST2
 
 
+#ifdef USE_LOG_PRINTF
+extern void log_printf(const char *logData, ...);
+#undef Dprintf
+#define Dprintf log_printf
+#else
+#define Dprintf printf
+#endif // USE_LOG_PRINTF
+
+
 namespace rack {
 
 
@@ -185,6 +194,7 @@ void ModuleWidget::fromJson(json_t *rootJ) {
 			if (!paramIdJ)
 				continue;
 			int paramId = json_integer_value(paramIdJ);
+         // Dprintf("fromJson: paramId=%d\n", paramId);
 			// Find ParamWidget(s) with paramId
 			for (ParamWidget *paramWidget : params) {
 				if (paramWidget->paramId == paramId)
diff --git a/src/app/ParamWidget.cpp b/src/app/ParamWidget.cpp
index 9fc9b366..600045d6 100644
--- a/src/app/ParamWidget.cpp
+++ b/src/app/ParamWidget.cpp
@@ -4,6 +4,14 @@
 #include "global.hpp"
 #include "global_ui.hpp"
 
+#ifdef USE_LOG_PRINTF
+extern void log_printf(const char *logData, ...);
+#undef Dprintf
+#define Dprintf log_printf
+#else
+#define Dprintf printf
+#endif // USE_LOG_PRINTF
+
 
 namespace rack {
 
@@ -21,7 +29,11 @@ json_t *ParamWidget::toJson() {
 void ParamWidget::fromJson(json_t *rootJ) {
 	json_t *valueJ = json_object_get(rootJ, "value");
 	if (valueJ)
-		setValue(json_number_value(valueJ));
+   {
+      float numberVal = json_number_value(valueJ);
+      // Dprintf("ParamWidget::fromJson: numberVal=%f\n", numberVal);
+		setValue(numberVal);
+   }
 }
 
 void ParamWidget::reset() {
diff --git a/src/widgets/QuantityWidget.cpp b/src/widgets/QuantityWidget.cpp
index 02e5e551..ae32a011 100644
--- a/src/widgets/QuantityWidget.cpp
+++ b/src/widgets/QuantityWidget.cpp
@@ -1,5 +1,13 @@
 #include "widgets.hpp"
 
+#ifdef USE_LOG_PRINTF
+extern void log_printf(const char *logData, ...);
+#undef Dprintf
+#define Dprintf log_printf
+#else
+#define Dprintf printf
+#endif // USE_LOG_PRINTF
+
 
 namespace rack {
 
@@ -9,21 +17,23 @@ QuantityWidget::QuantityWidget() {
 }
 
 void QuantityWidget::setValue(float value) {
-   // printf("xxx QuantityWidget::setValue: value=%f\n", value);
+   // Dprintf("xxx QuantityWidget::setValue: value=%f\n", value);
    if(isfinite(minValue) && isfinite(maxValue))
    {
+      // Dprintf("xxx QuantityWidget::setValue: isfinite value=%f\n", value);
       this->value = clamp(value, fminf(minValue, maxValue), fmaxf(minValue, maxValue));
       EventChange e;
       onChange(e);
    }
    else
    {
+      // Dprintf("xxx QuantityWidget::setValue: !isfinite value=%f\n", value);
       // Rotary knob
       this->value = value;
       EventChange e;
       onChange(e);
    }
-   // printf("xxx QuantityWidget::setValue: LEAVE value=%f\n", value);
+   // Dprintf("xxx QuantityWidget::setValue: LEAVE value=%f\n", value);
 }
 
 void QuantityWidget::setLimits(float minValue, float maxValue) {