fixed it

Author: tesselode

source/Filter.cpp

@@ -59,7 +59,7 @@ void MultiFilter::Process(double dt, double & l, double & r, double cutoff, bool
 
 	for (int i = 0; i < std::size(filters); i++)
 	{
-		filters[i].Process(dt, inL, inR, cutoff, tempOutL, tempOutR, highPass);
+		filters[i]->Process(dt, inL, inR, cutoff, tempOutL, tempOutR, highPass);
 		l += tempOutL * mix[i];
 		r += tempOutR * mix[i];
 	}

source/Filter.h

@@ -57,7 +57,7 @@ class StateVariableFilter
 class DualFilterBase
 {
 public:
-	void Process(double dt, double inL, double inR, double cutoff, double &outL, double &outR, bool highPass = false) {}
+	virtual void Process(double dt, double inL, double inR, double cutoff, double &outL, double &outR, bool highPass = false) {}
 };
 
 template<class T>
@@ -83,11 +83,11 @@ class MultiFilter
 
 private:
 	FilterModes mode = FilterModes::onePole;
-	std::array<DualFilterBase, numFilterModes> filters = {
-		DualFilter<OnePoleFilter>(),
-		DualFilter<TwoPoleFilter>(),
-		DualFilter<FourPoleFilter>(),
-		DualFilter<StateVariableFilter>()
+	std::array<std::unique_ptr<DualFilterBase>, numFilterModes> filters = {
+		std::unique_ptr<DualFilterBase>(new DualFilter<OnePoleFilter>()),
+		std::unique_ptr<DualFilterBase>(new DualFilter<TwoPoleFilter>()),
+		std::unique_ptr<DualFilterBase>(new DualFilter<FourPoleFilter>()),
+		std::unique_ptr<DualFilterBase>(new DualFilter<StateVariableFilter>())
 	};
 	std::array<double, numFilterModes> mix = {0.0, 0.0, 0.0, 0.0};
 };