Make an own class for AKF detector (tested for C2-B5)

PitchTracker/PitchTracker.vcxproj

@@ -95,6 +95,7 @@
       <PreprocessorDefinitions>WIN64;_DEBUG;_WINDOWS;_USRDLL;%(PreprocessorDefinitions)</PreprocessorDefinitions>
       <SDLCheck>true</SDLCheck>
       <FloatingPointModel>Fast</FloatingPointModel>
+      <MinimalRebuild>false</MinimalRebuild>
     </ClCompile>
     <Link>
       <SubSystem>Windows</SubSystem>
@@ -112,6 +113,7 @@
       <PreprocessorDefinitions>WIN32;_DEBUG;_WINDOWS;_USRDLL;%(PreprocessorDefinitions)</PreprocessorDefinitions>
       <SDLCheck>true</SDLCheck>
       <FloatingPointModel>Fast</FloatingPointModel>
+      <MinimalRebuild>false</MinimalRebuild>
     </ClCompile>
     <Link>
       <SubSystem>Windows</SubSystem>
@@ -169,7 +171,7 @@
   <ItemGroup>
     <ClCompile Include="compatibility.cpp" />
     <ClCompile Include="performous\pitch.cc" />
-    <ClCompile Include="pdaAKF.cpp" />
+    <ClCompile Include="ptAKF.cpp" />
     <ClCompile Include="PitchWrapper.cpp" />
   </ItemGroup>
   <ItemGroup>
@@ -177,7 +179,7 @@
     <ClInclude Include="Helper.h" />
     <ClInclude Include="performous\libda\fft.hpp" />
     <ClInclude Include="performous\libda\sample.hpp" />
-    <ClInclude Include="pdaAKF.h" />
+    <ClInclude Include="ptAKF.h" />
     <ClInclude Include="PitchWrapper.h" />
   </ItemGroup>
   <ItemGroup>

PitchTracker/PitchTracker.vcxproj.filters

@@ -33,7 +33,7 @@
     <ClCompile Include="performous\pitch.cc">
       <Filter>Quelldateien\performous</Filter>
     </ClCompile>
-    <ClCompile Include="pdaAKF.cpp">
+    <ClCompile Include="ptAKF.cpp">
       <Filter>Quelldateien</Filter>
     </ClCompile>
   </ItemGroup>
@@ -53,7 +53,7 @@
     <ClInclude Include="performous\libda\sample.hpp">
       <Filter>Headerdateien\performous\libda</Filter>
     </ClInclude>
-    <ClInclude Include="pdaAKF.h">
+    <ClInclude Include="ptAKF.h">
       <Filter>Headerdateien</Filter>
     </ClInclude>
   </ItemGroup>

PitchTracker/PitchWrapper.cpp

@@ -1,58 +1,23 @@
 #include "PitchWrapper.h"
-#include "pdaAKF.h"
 #include "Helper.h"
 
-AnalyzerExt::AnalyzerExt(double baseToneFrequency, int minHalfTone, int maxHalfTone, unsigned step): Analyzer(44100., "", step){
+
-	PitchTrackerAKF::Init(baseToneFrequency, minHalfTone, maxHalfTone);
+Analyzer* Analyzer_Create(unsigned step){
+    return new Analyzer(44100, "", step);
 }
 
-AnalyzerExt::~AnalyzerExt(){
+void Analyzer_Free(Analyzer* analyzer){
-	PitchTrackerAKF::DeInit();
-}
-
-int AnalyzerExt::GetNoteFast(double* maxVolume, float* weights){
-	float AnaylsisBuf[m_SampleCt];
-	size_t size = m_fastAnalysisBuf.size();
-	if(size > m_SampleCt)
-		m_fastAnalysisBuf.pop(size - m_SampleCt);
-	if(!m_fastAnalysisBuf.read(AnaylsisBuf, AnaylsisBuf + m_SampleCt))
-		return -1;
-	return PitchTrackerAKF::GetTone(AnaylsisBuf, m_SampleCt, maxVolume, weights);
-}
-
-void PtFast_Init(double baseToneFrequency, int minHalfTone, int maxHalfTone){
-	PitchTrackerAKF::Init(baseToneFrequency, minHalfTone, maxHalfTone);
-}
-
-void PtFast_DeInit(){
-	PitchTrackerAKF::DeInit();
-}
-
-int PtFast_GetTone(short* samples, int sampleCt, double* maxVolume, float* weights){
-	if(sampleCt <= 0)
-		return -1;
-	double* dataDouble = short2DoubleArray(samples, sampleCt, false);
-	int result = PitchTrackerAKF::GetTone(dataDouble, sampleCt, maxVolume, weights, true);
-	freeDoubleArray(dataDouble);
-	return result;
-}
-
-AnalyzerExt* Analyzer_Create(double baseToneFrequency, int minHalfTone, int maxHalfTone, unsigned step){
-    return new AnalyzerExt(baseToneFrequency, minHalfTone, maxHalfTone, step);
-}
-
-void Analyzer_Free(AnalyzerExt* analyzer){
     if(analyzer)
 		delete analyzer;
 }
 
-void Analyzer_InputFloat(AnalyzerExt* analyzer, float* data, int sampleCt){
+void Analyzer_InputFloat(Analyzer* analyzer, float* data, int sampleCt){
 	if(sampleCt == 0 || !analyzer)
 		return;
 	analyzer->input(data, data + sampleCt);
 }
 
-void Analyzer_InputShort(AnalyzerExt* analyzer, short* data, int sampleCt){
+void Analyzer_InputShort(Analyzer* analyzer, short* data, int sampleCt){
 	if(sampleCt == 0 || !analyzer)
 		return;
 	float* dataFloat = short2FloatArray(data, sampleCt);
@@ -60,45 +25,64 @@ void Analyzer_InputShort(AnalyzerExt* analyzer, short* data, int sampleCt){
 	freeFloatArray(dataFloat);  
 }
 
-void Analyzer_InputByte(AnalyzerExt* analyzer, char* data, int sampleCt){
+void Analyzer_InputByte(Analyzer* analyzer, char* data, int sampleCt){
-	if(sampleCt == 0 || !analyzer)
+	if(sampleCt <= 0 || !analyzer)
 		return;
 	float* dataFloat = short2FloatArray(static_cast<short*>(static_cast<void*>(data)), sampleCt);
 	analyzer->input(dataFloat, dataFloat + sampleCt);
 	freeFloatArray(dataFloat);
 }
 
-void Analyzer_Process(AnalyzerExt* analyzer){
+void Analyzer_Process(Analyzer* analyzer){
 	if(!analyzer)
 		return;
     analyzer->process();
 }
 
-double Analyzer_GetPeak(AnalyzerExt* analyzer){
+double Analyzer_GetPeak(Analyzer* analyzer){
 	if(!analyzer)
 		return -999;
 	return analyzer->getPeak();   
 }
 
-double Analyzer_FindNote(AnalyzerExt* analyzer, double minFreq, double maxFreq){
+double Analyzer_FindNote(Analyzer* analyzer, double minFreq, double maxFreq){
 	if(!analyzer)
 		return -1;
 	const Tone* tone = analyzer->findTone(minFreq, maxFreq);
 	return (tone == NULL) ? -1 : FreqToNote(tone->freq);    
 }
 
-int Analyzer_GetNoteFast(AnalyzerExt* analyzer, double* maxVolume, float* weights){
+bool Analyzer_OutputFloat(Analyzer* analyzer, float* data, int sampleCt, float rate){
-	if(!analyzer)
-		return -1;
-	return analyzer->GetNoteFast(maxVolume, weights);
-}
-
-bool Analyzer_OutputFloat(AnalyzerExt* analyzer, float* data, int sampleCt, float rate){
 	if(!analyzer)
 		return false;
     return analyzer->output(data, data + sampleCt, rate);
 }
 
+DllExport PtAKF* PtAKF_Create(){
+	return new PtAKF();
+}
+
+DllExport void PtAKF_Free(PtAKF* analyzer){
+	if(analyzer)
+		delete analyzer;
+}
+
+DllExport int PtAKF_GetNumHalfTones(){
+	return PtAKF::GetNumHalfTones();
+}
+
+DllExport void PtAKF_InputByte(PtAKF* analyzer, char* data, int sampleCt){
+	if(sampleCt <= 0 || !analyzer)
+		return;
+	short* dataShort = static_cast<short*>(static_cast<void*>(data));
+	analyzer->input(dataShort, dataShort + sampleCt);
+}
+
+DllExport int PtAKF_GetNote(PtAKF* analyzer, double* maxVolume, float* weights){
+	if(!analyzer)
+		return -1;
+	return analyzer->GetNote(maxVolume, weights);
+}
 
 /*
 namespace Native{

PitchTracker/PitchWrapper.h

@@ -1,37 +1,25 @@
 #pragma once
 
 #include "performous/pitch.hh"
+#include "ptAKF.h"
 
 #define DllExport extern "C" __declspec(dllexport)
 
-class AnalyzerExt: public Analyzer{
+DllExport Analyzer* Analyzer_Create(unsigned step);
-public:
+DllExport void Analyzer_Free(Analyzer* analyzer);
-	AnalyzerExt(double baseToneFrequency, int minHalfTone, int maxHalfTone, unsigned step = 200);
+DllExport void Analyzer_InputFloat(Analyzer* analyzer, float* data, int sampleCt);
-	~AnalyzerExt();
+DllExport void Analyzer_InputShort(Analyzer* analyzer, short* data, int sampleCt);
-	template <typename InIt> void input(InIt begin, InIt end){
+DllExport void Analyzer_InputByte(Analyzer* analyzer, char* data, int sampleCt);
-		m_fastAnalysisBuf.insert(begin, end);
+DllExport void Analyzer_Process(Analyzer* analyzer);
-		Analyzer::input(begin, end);
+DllExport double Analyzer_GetPeak(Analyzer* analyzer);
-	}
+DllExport double Analyzer_FindNote(Analyzer* analyzer, double minFreq, double maxFreq);
-	int GetNoteFast(double* maxVolume, float* weights);
+DllExport bool Analyzer_OutputFloat(Analyzer* analyzer, float* data, int sampleCt, float rate);
-private:
-	constexpr static size_t m_SampleCt = 4096;
-	RingBuffer<m_SampleCt * 2> m_fastAnalysisBuf; // Buffer used for fast analysis instead of FFT
-};
 
-DllExport void PtFast_Init(double baseToneFrequency, int minHalfTone, int maxHalfTone);
+DllExport PtAKF* PtAKF_Create();
-DllExport void PtFast_DeInit();
+DllExport void PtAKF_Free(PtAKF* analyzer);
-DllExport int PtFast_GetTone(short* samples, int sampleCt, float* weights);
+DllExport int PtAKF_GetNumHalfTones();
-
+DllExport void PtAKF_InputByte(PtAKF* analyzer, char* data, int sampleCt);
-DllExport AnalyzerExt* Analyzer_Create(double baseToneFrequency, int minHalfTone, int maxHalfTone, unsigned step);
+DllExport int PtAKF_GetNote(PtAKF* analyzer, double* maxVolume, float* weights);
-DllExport void Analyzer_Free(AnalyzerExt* analyzer);
-DllExport void Analyzer_InputFloat(AnalyzerExt* analyzer, float* data, int sampleCt);
-DllExport void Analyzer_InputShort(AnalyzerExt* analyzer, short* data, int sampleCt);
-DllExport void Analyzer_InputByte(AnalyzerExt* analyzer, char* data, int sampleCt);
-DllExport void Analyzer_Process(AnalyzerExt* analyzer);
-DllExport double Analyzer_GetPeak(AnalyzerExt* analyzer);
-DllExport int Analyzer_GetNoteFast(AnalyzerExt* analyzer, double* maxVolume, float* weights);
-DllExport double Analyzer_FindNote(AnalyzerExt* analyzer, double minFreq, double maxFreq);
-DllExport bool Analyzer_OutputFloat(AnalyzerExt* analyzer, float* data, int sampleCt, float rate);
 
 /*
 public ref class CTone {
@@ -74,7 +62,7 @@ public:
 	String^ GetId();
 
 private:
-	AnalyzerExt* m_analyzer;
+	Analyzer* m_analyzer;
 	String^ m_id;
 };
 

PitchTracker/pdaAKF.h

@@ -1,12 +0,0 @@
-#pragma once
-
-// A pitch detection that is based on the AKF and AMDF (initially from original Vocaluxe/USDx)
-namespace PitchTrackerAKF{
-	void Init(double baseToneFrequency, int minHalfTone, int maxHalfTone);
-	void DeInit();
-	template<typename T> int GetTone(T *samples, int sampleCt, double* maxVolume, float *weights, bool scale = false);
-
-	typedef void (__stdcall * LogCallback)(const char* text);
-	static LogCallback Log;
-	void SetLogCallback(LogCallback Callback);
-}

PitchTracker/ptAKF.cpp

@@ -13,28 +13,112 @@
 // You should have received a copy of the GNU General Public License
 // along with Vocaluxe. If not, see <http://www.gnu.org/licenses/>.
 
-#include "pdaAKF.h"
+#include "ptAKF.h"
 #include <math.h>
-#include <stdlib.h>
+
-#include <stdarg.h>
+static constexpr double BaseToneFrequency = 65.4064; // lowest (half-)tone to analyze (C2 = 65.4064 Hz)
-#include <stdio.h>
+static constexpr double HalftoneBase = 1.05946309436; // 2^(1/12) -> HalftoneBase^12 = 2 (one octave)
+int PtAKF::_InitCount = 0;
+float* PtAKF::_SamplesPerPeriodPerTone = NULL;
+
+PtAKF::PtAKF(){
+	_InitCount++;
+	if(_InitCount == 1){
+		_SamplesPerPeriodPerTone = new float[_MaxHalfTone + 1];
+		//Init Array to avoid costly calculations
+		for (int toneIndex = 0; toneIndex <= _MaxHalfTone; toneIndex++)
+		{
+			double freq = BaseToneFrequency * pow(HalftoneBase, toneIndex);
+			_SamplesPerPeriodPerTone[toneIndex] = static_cast<float>(44100.0 / freq); // samples in one period
+		}
+	}
+}
+
+PtAKF::~PtAKF(){
+	_InitCount--;
+	if(!_InitCount){
+		delete[] _SamplesPerPeriodPerTone;
+		_SamplesPerPeriodPerTone = NULL;
+	}
+}
+
+int PtAKF::GetNote(double* maxVolume, float* weights){
+	float AnaylsisBuf[_SampleCt];
+	size_t size = _AnalysisBuf.size();
+	if(size > _SampleCt)
+		_AnalysisBuf.pop(size - _SampleCt);
+	if(!_AnalysisBuf.read(AnaylsisBuf, AnaylsisBuf + _SampleCt))
+		return -1;
+	return _GetNote(AnaylsisBuf, maxVolume, weights);
+}
+
+int PtAKF::_GetNote(float* samples, double* maxVolume, float* weights){
+	float maxVolumeL = 0;
+	for(int i = 0; i < _SampleCt; i++){
+		float vol = abs(samples[i]);
+		if(vol > maxVolumeL)
+			maxVolumeL = vol;
+	}
+	maxVolumeL /= 32767.;
+	*maxVolume = maxVolumeL;
+
+	float maxWeight = -1;
+	float minWeight = 1;
+	int maxTone = -1;
+	for (int toneIndex = _MinHalfTone; toneIndex <= _MaxHalfTone; toneIndex++)
+	{
+		float curWeight = _AnalyzeToneFunc(samples, toneIndex);
+
+		if (curWeight > maxWeight)
+		{
+			maxWeight = curWeight;
+			maxTone = toneIndex;
+		}
+
+		if (curWeight < minWeight)
+			minWeight = curWeight;
+
+		weights[toneIndex - _MinHalfTone] = curWeight;
+	}
+
+	if(maxWeight - minWeight > 0.01){
+		return maxTone;
+	}else return -1;
+}
+
+float PtAKF::_AnalyzeToneFunc(float* samples, int toneIndex){
+	// Use method by Kobayashi and Shimamura (1995): Combine AKF and AMDF to a new f(z)=AKF(z)/(AMDF(z)+k) with k=1
+
+	float samplesPerPeriodD = _SamplesPerPeriodPerTone[toneIndex]; // samples in one period
+	int samplesPerPeriod = static_cast<int>(samplesPerPeriodD);
+	float fHigh = samplesPerPeriodD - samplesPerPeriod;
+	float fLow = 1.0f - fHigh;
+
+	float accumDistAKF = 0; // accumulated distances
+	float accumDistAMDF = 0; // accumulated distances
+
+	// compare correlating samples
+	int sampleIndex = 0; // index of sample to analyze
+	// Start value= index of sample one period ahead
+	for (int correlatingSampleIndex = sampleIndex + samplesPerPeriod; correlatingSampleIndex + 1 < _SampleCt; correlatingSampleIndex++, sampleIndex++)
+	{
+		// calc distance to corresponding sample in next period
+		float xn = samples[sampleIndex];
+		float xnt = samples[correlatingSampleIndex] * fLow + samples[correlatingSampleIndex + 1] * fHigh;
+		accumDistAKF += xn * xnt;
+		accumDistAMDF += abs(xn - xnt);
+	}
+
+	accumDistAKF /= _SampleCt;
+	accumDistAMDF /= sampleIndex;
+
+	return accumDistAKF / (accumDistAMDF * 32767.f + 32767.f); // Need to scale AKF by MAX^2 and AMDF by MAX, so do some maths to divide only once
+}
+/*
+
+
 
 namespace PitchTrackerAKF{
-
-	static void doLog(const char* msg,...){
-		va_list argptr = NULL;
-		va_start(argptr, msg);
-
-		char buffer[200];  
-		vsprintf_s(buffer,msg, argptr);
-		if(Log) Log(buffer);
-		va_end(argptr);    
-	}
-
-	void SetLogCallback(LogCallback Callback){
-		Log=Callback;
-	}
-
 	static double *SamplesPerPeriodPerTone = NULL;
 	static double BaseToneFrequency = -1;
 	static int MinHalfTone = -1, MaxHalfTone = -1;
@@ -138,4 +222,5 @@ namespace PitchTrackerAKF{
 	template int GetTone(float *samples, int sampleCt, double* maxVolume, float *weights, bool scale);
 	template int GetTone(double *samples, int sampleCt, double* maxVolume, float *weights, bool scale);
 
-}
+}
+*/

PitchTracker/ptAKF.h

@@ -0,0 +1,27 @@
+#pragma once
+#include "performous/pitch.hh"
+
+// A pitch detection that is based on the AKF and AMDF (initially from original Vocaluxe/USDx)
+class PtAKF{
+public:
+	PtAKF();
+	~PtAKF();
+
+	void input(short* begin, short* end){
+		_AnalysisBuf.insert(begin, end);
+	}
+
+	int GetNote(double* maxVolume, float* weights);
+	static int GetNumHalfTones(){ return _MaxHalfTone - _MinHalfTone + 1;}
+private:
+	static int _InitCount;
+	static float* _SamplesPerPeriodPerTone;
+	static constexpr int _MinHalfTone = 0;  //C2
+	static constexpr int _MaxHalfTone = 47; //B5
+
+	constexpr static size_t _SampleCt = 4096;
+	RingBuffer<_SampleCt * 2> _AnalysisBuf;
+
+	static int _GetNote(float* samples, double* maxVolume, float* weights);
+	static float _AnalyzeToneFunc(float* samples, int toneIndex);
+};

Vocaluxe/Lib/Sound/Record/CAnalyzer.cs

@@ -3,11 +3,15 @@ using System.Runtime.InteropServices;
 
 namespace Vocaluxe.Lib.Sound.Record
 {
+    /// <summary>
+    /// Analyzer from Performous
+    /// Should be very reliable but needs some proof (artificial tests show some errors)
+    /// </summary>
     class CAnalyzer : IDisposable
     {
         #region Imports
         [DllImport("PitchTracker.dll", CallingConvention = CallingConvention.Cdecl)]
-        private static extern IntPtr Analyzer_Create(double baseToneFrequency, int minHalfTone, int maxHalfTone, uint step = 200);
+        private static extern IntPtr Analyzer_Create(uint step = 200);
 
         [DllImport("PitchTracker.dll", CallingConvention = CallingConvention.Cdecl)]
         private static extern void Analyzer_Free(IntPtr analyzer);
@@ -27,9 +31,6 @@ namespace Vocaluxe.Lib.Sound.Record
         [DllImport("PitchTracker.dll", CallingConvention = CallingConvention.Cdecl)]
         private static extern double Analyzer_GetPeak(IntPtr analyzer);
 
-        [DllImport("PitchTracker.dll", CallingConvention = CallingConvention.Cdecl)]
-        private static extern int Analyzer_GetNoteFast(IntPtr analyzer, [Out] out double maxVolume, [Out] float[] weights);
-
         [DllImport("PitchTracker.dll", CallingConvention = CallingConvention.Cdecl)]
         private static extern double Analyzer_FindNote(IntPtr analyzer, double minFreq, double maxFreq);
 
@@ -39,9 +40,9 @@ namespace Vocaluxe.Lib.Sound.Record
 
         private IntPtr _Instance;
 
-        public CAnalyzer(double baseToneFrequency, int minHalfTone, int maxHalfTone, uint step = 200)
+        public CAnalyzer(uint step = 200)
         {
-            _Instance = Analyzer_Create(baseToneFrequency, minHalfTone, maxHalfTone, step);
+            _Instance = Analyzer_Create(step);
         }
 
         ~CAnalyzer()
@@ -79,11 +80,6 @@ namespace Vocaluxe.Lib.Sound.Record
             return Analyzer_FindNote(_Instance, minFreq, maxFreq);
         }
 
-        public int GetNoteFast(out double maxVolume, float[] weights)
-        {
-            return Analyzer_GetNoteFast(_Instance, out maxVolume, weights);
-        }
-
         public bool Output(float[] data, float rate)
         {
             return Analyzer_OutputFloat(_Instance, data, data.Length, rate);
@@ -104,22 +100,63 @@ namespace Vocaluxe.Lib.Sound.Record
         }
     }
 
-    static class CFastAnalyzer
+    /// <summary>
+    /// Pitchtracker (Pt) that uses autocorrelation (AKF) and AMDF
+    /// Quite fast and perfect in artificial tests, but may fail in real world scenarios (e.g. missing fundamental)
+    /// </summary>
+    class CPtAKF : IDisposable
     {
         #region Imports
-        [DllImport("PitchTracker.dll", EntryPoint = "PtFast_Init", CallingConvention = CallingConvention.Cdecl)]
+        [DllImport("PitchTracker.dll", CallingConvention = CallingConvention.Cdecl)]
-        public static extern void Init(double baseToneFrequency, int minHalfTone, int maxHalfTone);
+        private static extern IntPtr PtAKF_Create();
 
-        [DllImport("PitchTracker.dll", EntryPoint = "PtFast_DeInit", CallingConvention = CallingConvention.Cdecl)]
+        [DllImport("PitchTracker.dll", CallingConvention = CallingConvention.Cdecl)]
-        public static extern void DeInit();
+        private static extern void PtAKF_Free(IntPtr analyzer);
 
-        [DllImport("PitchTracker.dll", EntryPoint = "PtFast_GetTone", CallingConvention = CallingConvention.Cdecl)]
+        [DllImport("PitchTracker.dll", EntryPoint = "PtAKF_GetNumHalfTones", CallingConvention = CallingConvention.Cdecl)]
-        private static extern int PtFast_GetTone([In] short[] samples, int sampleCt, [Out] out double maxVolume, [Out] float[] weights);
+        public static extern int GetNumHalfTones();
+
+        [DllImport("PitchTracker.dll", CallingConvention = CallingConvention.Cdecl)]
+        private static extern void PtAKF_InputByte(IntPtr analyzer, [In] byte[] data, int sampleCt);
+
+        [DllImport("PitchTracker.dll", CallingConvention = CallingConvention.Cdecl)]
+        private static extern int PtAKF_GetNote(IntPtr analyzer, [Out] out double maxVolume, [Out] float[] weights);
         #endregion
 
-        public static int GetTone(short[] samples, out double maxVolume, float[] weights)
+        private IntPtr _Instance;
+
+        public CPtAKF()
         {
-            return PtFast_GetTone(samples, samples.Length, out maxVolume, weights);
+            _Instance = PtAKF_Create();
+        }
+
+        ~CPtAKF()
+        {
+            _Dispose(false);
+        }
+
+        public void Input(byte[] data)
+        {
+            PtAKF_InputByte(_Instance, data, data.Length / 2);
+        }
+
+        public int GetNote(out double maxVolume, float[] weights)
+        {
+            return PtAKF_GetNote(_Instance, out maxVolume, weights);
+        }
+
+        private void _Dispose(bool disposing)
+        {
+            if (_Instance == IntPtr.Zero)
+                throw new ObjectDisposedException(GetType().Name);
+            PtAKF_Free(_Instance);
+            _Instance = IntPtr.Zero;
+        }
+
+        public void Dispose()
+        {
+            _Dispose(true);
+            GC.SuppressFinalize(this);
         }
     }
 }

Vocaluxe/Lib/Sound/Record/CBuffer.cs

@@ -29,22 +29,19 @@ namespace Vocaluxe.Lib.Sound.Record
 {
     class CBuffer : IDisposable
     {
+#if TEST_PITCH
         //Half tones: C C♯ D D# E F F♯ G G♯ A A# B
         private const double _BaseToneFreq = 65.4064; // lowest (half-)tone to analyze (C2 = 65.4064 Hz)
-#if TEST_PITCH
         private const double _HalftoneBase = 1.05946309436; // 2^(1/12) -> HalftoneBase^12 = 2 (one octave)
 #endif
-        private const int _HalfToneMin = 0; // C2
+        private CPtAKF _Analyzer = new CPtAKF();
-        private const int _HalfToneMax = 38; //45; // inclusive, 38=D5; 45=A5
-        public const int NumHalfTones = _HalfToneMax - _HalfToneMin + 1; //Number of halftones to analyze
-        private CAnalyzer _Analyzer = new CAnalyzer(_BaseToneFreq, _HalfToneMin, _HalfToneMax);
 
         private double _MaxVolume;
 
         public CBuffer()
         {
             MinVolume = 0.02f;
-            ToneWeigths = new float[NumHalfTones];
+            ToneWeigths = new float[GetNumHalfTones()];
             Reset();
 #if TEST_PITCH
             _TestPitchDetection();
@@ -56,6 +53,11 @@ namespace Vocaluxe.Lib.Sound.Record
             _Dispose();
         }
 
+        public static int GetNumHalfTones()
+        {
+            return CPtAKF.GetNumHalfTones();
+        }
+
         public int ToneAbs { get; private set; }
 
         public int Tone { get; set; }
@@ -98,7 +100,7 @@ namespace Vocaluxe.Lib.Sound.Record
         {
             //_Analyzer.Process();
             //_MaxVolume = _Analyzer.GetPeak() / 43 + 1;
-            int tone = _Analyzer.GetNoteFast(out _MaxVolume, ToneWeigths); //(int)Math.Round(_Analyzer.FindNote()); // 
+            int tone = _Analyzer.GetNote(out _MaxVolume, ToneWeigths); //(int)Math.Round(_Analyzer.FindNote()); // 
             if (tone >= 0 && _MaxVolume >= MinVolume)
             {
                 ToneAbs = tone;
@@ -142,7 +144,7 @@ namespace Vocaluxe.Lib.Sound.Record
             if (_PitchTestRun)
                 return;
             _PitchTestRun = true;
-            int toneFrom = Math.Max(0, _HalfToneMin);
+            int toneFrom = 0;
             const int toneTo = 47; //B5
             Console.WriteLine("Testing notes " + _ToneToNote(toneFrom) + " - " + _ToneToNote(toneTo));
             byte[] data;

Vocaluxe/Lib/Sound/Record/CRecordBase.cs

@@ -132,7 +132,7 @@ namespace Vocaluxe.Lib.Sound.Record
 
         public int NumHalfTones()
         {
-            return CBuffer.NumHalfTones;
+            return CBuffer.GetNumHalfTones();
         }
 
         public float[] ToneWeigth(int player)