Fixes #1052

companion/src/eeprominterface.cpp

@@ -1003,6 +1003,17 @@ ExpoData * ModelData::insertInput(const int idx)
   return &expoData[idx];
 }
 
+bool ModelData::isInputValid(const unsigned int idx) const
+{
+  for (int i=0; i<C9X_MAX_EXPOS; i++) {
+    const ExpoData * expo = &expoData[i];
+    if (expo->mode == 0) break;
+    if (expo->chn == idx)
+      return true;
+  }
+  return false;
+}
+
 void ModelData::removeInput(const int idx)
 {
   memmove(&expoData[idx], &expoData[idx+1], (C9X_MAX_EXPOS-(idx+1))*sizeof(ExpoData));

companion/src/eeprominterface.h

@@ -939,6 +939,8 @@ class ModelData {
     ExpoData * insertInput(const int idx);
     void removeInput(const int idx);
 
+    bool isInputValid(const unsigned int idx) const;
+
     bool      used;
     char      name[12+1];
     uint8_t   modelVoice;

companion/src/helpers.cpp

@@ -548,9 +548,11 @@ void populateSourceCB(QComboBox *b, const RawSource & source, const ModelData &
   if (flags & POPULATE_VIRTUAL_INPUTS) {
     int virtualInputs = GetCurrentFirmware()->getCapability(VirtualInputs);
     for (int i=0; i<virtualInputs; i++) {
-      item = RawSource(SOURCE_TYPE_VIRTUAL_INPUT, i, &model);
-      b->addItem(item.toString(), item.toValue());
-      if (item == source) b->setCurrentIndex(b->count()-1);
+      if (model.isInputValid(i)) {
+        item = RawSource(SOURCE_TYPE_VIRTUAL_INPUT, i, &model);
+        b->addItem(item.toString(), item.toValue());
+        if (item == source) b->setCurrentIndex(b->count()-1);
+      }
     }
   }