diff --git a/src/ViPER4Android.cpp b/src/ViPER4Android.cpp
index e2bac23..fa56caa 100644
--- a/src/ViPER4Android.cpp
+++ b/src/ViPER4Android.cpp
@@ -250,7 +250,7 @@ static int32_t Viper_ICommand(effect_handle_t self,
             return 0;
         }
         case EFFECT_CMD_DISABLE: {
-//            pContext->viper->enabled = false;
+//            pContext->viper->enable = false;
             *((int *) pReplyData) = 0;
             return 0;
         }
diff --git a/src/viper/effects/DiffSurround.cpp b/src/viper/effects/DiffSurround.cpp
index a87487c..49f36d3 100644
--- a/src/viper/effects/DiffSurround.cpp
+++ b/src/viper/effects/DiffSurround.cpp
@@ -5,7 +5,7 @@
 DiffSurround::DiffSurround() {
     this->samplingRate = VIPER_DEFAULT_SAMPLING_RATE;
     this->delayTime = 0.0f;
-    this->enabled = false;
+    this->enable = false;
     for (auto &buffer : this->buffers) {
         buffer = new WaveBuffer(1, 0x1000);
     }
@@ -19,27 +19,27 @@ DiffSurround::~DiffSurround() {
 }
 
 void DiffSurround::Process(float *samples, uint32_t size) {
+    if (!this->enable) return;
+
     float *bufs[2];
     float *outbufs[2];
 
-    if (this->enabled) {
-        bufs[0] = this->buffers[0]->PushZerosGetBuffer(size);
-        bufs[1] = this->buffers[1]->PushZerosGetBuffer(size);
+    bufs[0] = this->buffers[0]->PushZerosGetBuffer(size);
+    bufs[1] = this->buffers[1]->PushZerosGetBuffer(size);
 
-        for (uint32_t i = 0; i < size * 2; i++) {
-            bufs[i % 2][i / 2] = samples[i];
-        }
-
-        outbufs[0] = this->buffers[0]->GetBuffer();
-        outbufs[1] = this->buffers[1]->GetBuffer();
-
-        for (uint32_t i = 0; i < size * 2; i++) {
-            samples[i] = outbufs[i % 2][i / 2];
-        }
-
-        this->buffers[0]->PopSamples(size, false);
-        this->buffers[1]->PopSamples(size, false);
+    for (uint32_t i = 0; i < size * 2; i++) {
+        bufs[i % 2][i / 2] = samples[i];
     }
+
+    outbufs[0] = this->buffers[0]->GetBuffer();
+    outbufs[1] = this->buffers[1]->GetBuffer();
+
+    for (uint32_t i = 0; i < size * 2; i++) {
+        samples[i] = outbufs[i % 2][i / 2];
+    }
+
+    this->buffers[0]->PopSamples(size, false);
+    this->buffers[1]->PopSamples(size, false);
 }
 
 void DiffSurround::Reset() {
@@ -56,12 +56,12 @@ void DiffSurround::SetDelayTime(float delayTime) {
     }
 }
 
-void DiffSurround::SetEnable(bool enabled) {
-    if (this->enabled != enabled) {
-        if (!this->enabled) {
+void DiffSurround::SetEnable(bool enable) {
+    if (this->enable != enable) {
+        if (!this->enable) {
             Reset();
         }
-        this->enabled = enabled;
+        this->enable = enable;
     }
 }
 
diff --git a/src/viper/effects/DiffSurround.h b/src/viper/effects/DiffSurround.h
index 34365ee..eb10ac0 100644
--- a/src/viper/effects/DiffSurround.h
+++ b/src/viper/effects/DiffSurround.h
@@ -11,11 +11,11 @@ public:
     void Process(float *samples, uint32_t size);
     void Reset();
     void SetDelayTime(float delayTime);
-    void SetEnable(bool enabled);
+    void SetEnable(bool enable);
     void SetSamplingRate(uint32_t samplingRate);
 
     uint32_t samplingRate;
-    bool enabled;
+    bool enable;
     float delayTime;
     WaveBuffer *buffers[2];
 };
diff --git a/src/viper/effects/DynamicSystem.cpp b/src/viper/effects/DynamicSystem.cpp
index 5714101..c848a4a 100644
--- a/src/viper/effects/DynamicSystem.cpp
+++ b/src/viper/effects/DynamicSystem.cpp
@@ -25,7 +25,7 @@ void DynamicSystem::SetBassGain(float gain) {
 
 void DynamicSystem::SetEnable(bool enable) {
     if (this->enable != enable) {
-        if (!this->enable) {
+        if (enable) {
             Reset();
         }
         this->enable = enable;
diff --git a/src/viper/effects/IIRFilter.cpp b/src/viper/effects/IIRFilter.cpp
index 91781c7..cfd20da 100644
--- a/src/viper/effects/IIRFilter.cpp
+++ b/src/viper/effects/IIRFilter.cpp
@@ -3,6 +3,8 @@
 #include "IIRFilter.h"
 #include "../constants.h"
 
+// Iscle: Verified with latest version at 13/12/2022
+
 IIRFilter::IIRFilter(uint32_t bands) {
     this->enable = false;
     this->samplingRate = VIPER_DEFAULT_SAMPLING_RATE;
@@ -40,8 +42,8 @@ void IIRFilter::Process(float *samples, uint32_t size) {
                 double coeff3 = coeffs[k * 4 + 2];
 
                 double a = coeff3 * this->buf[bufIdx + ((this->unknown3 + 3) - this->unknown2)];
-                double b = coeff2 * (sample - this->buf[bufIdx + (unknown4 - unknown2)]);
-                double c = coeff1 * this->buf[bufIdx + ((unknown4 - unknown2) + 3)];
+                double b = coeff2 * (sample - this->buf[bufIdx + (this->unknown4 - this->unknown2)]);
+                double c = coeff1 * this->buf[bufIdx + ((this->unknown4 - this->unknown2) + 3)];
 
                 double tmp = (a + b) - c;
 
@@ -67,7 +69,7 @@ void IIRFilter::Reset() {
 
 void IIRFilter::SetBandLevel(uint32_t band, float level) {
     if (band > 30) return;
-    double bandLevel = pow(10.0, level / 20.0);
+    double bandLevel = pow(10.0, (double) level / 20.0);
     this->bandLevelsWithQ[band] = (float) (bandLevel * 0.636);
 }
 
@@ -75,7 +77,7 @@ void IIRFilter::SetEnable(bool enable) {
     if (this->enable != enable) {
         this->enable = enable;
         if (enable) {
-            this->Reset();
+            Reset();
         }
     }
 }
@@ -84,8 +86,8 @@ void IIRFilter::SetSamplingRate(uint32_t samplingRate) {
     if (this->samplingRate != samplingRate) {
         this->samplingRate = samplingRate;
         if (this->bands != 0) {
-            this->minPhaseIirCoeffs.UpdateCoeffs(this->bands, this->samplingRate);
+            this->minPhaseIirCoeffs.UpdateCoeffs(this->bands, samplingRate);
         }
-        this->Reset();
+        Reset();
     }
 }
diff --git a/src/viper/effects/IIRFilter.h b/src/viper/effects/IIRFilter.h
index bd9982e..948d79d 100644
--- a/src/viper/effects/IIRFilter.h
+++ b/src/viper/effects/IIRFilter.h
@@ -3,6 +3,8 @@
 #include <cstdint>
 #include "../utils/MinPhaseIIRCoeffs.h"
 
+// Iscle: Verified with latest version at 13/12/2022
+
 class IIRFilter {
 public:
     IIRFilter(uint32_t bands);
diff --git a/src/viper/effects/PlaybackGain.cpp b/src/viper/effects/PlaybackGain.cpp
index b891fee..0f4a607 100644
--- a/src/viper/effects/PlaybackGain.cpp
+++ b/src/viper/effects/PlaybackGain.cpp
@@ -17,7 +17,7 @@ PlaybackGain::PlaybackGain() {
     this->biquad2.SetBandPassParameter(2200.0,this->samplingRate,0.33);
 }
 
-float PlaybackGain::AnalyseWave(float *samples, uint32_t size) {
+double PlaybackGain::AnalyseWave(float *samples, uint32_t size) {
     if (size == 0) return 0.0;
 
     double tmpL = 0.0;
@@ -31,13 +31,51 @@ float PlaybackGain::AnalyseWave(float *samples, uint32_t size) {
         tmpR += tmpR2 * tmpR2;
     }
 
-    float tmp = tmpL;
+    double tmp;
+    if (tmpL > tmpR) {
+        tmp = tmpL;
+    } else {
+        tmp = tmpR;
+    }
 
-    return tmp / (float) size;
+    return tmp / (double) size;
 }
 
-void PlaybackGain::Process(float *samples, uint32_t size) {
+//static float PlaybackGain::ProcessSingle(float sample) {
+//
+//}
 
+void PlaybackGain::Process(float *samples, uint32_t size) {
+    if (!this->enable) return;
+    if (size == 0) return;
+
+    double analyzed = AnalyseWave(samples, size);
+    double a = log(analyzed);
+
+    if (this->counterTo100 < 100) {
+        this->counterTo100++;
+    }
+
+    double b = a * this->unknown1 * 10.0 + 23.0;
+    double c = ((double) this->counterTo100 / 100.0) * (b * this->ratio2 - b);
+    double d = c / 100.0;
+    double e = pow(10.0, (c - d * d * 50.0) / 20.0);
+    uint32_t f;
+    if (size < this->samplingRate / 40) {
+        f = this->samplingRate / 40;
+    } else {
+        f = size;
+    }
+
+    double unk2 = this->unknown2;
+    double g = (e * this->volume - this->unknown2) / f;
+    if (g >= 0.0) {
+        g *= 0.0625;
+    }
+
+    for (uint32_t i = 0; i < size; i++) {
+        
+    }
 }
 
 void PlaybackGain::Reset() {
@@ -50,10 +88,10 @@ void PlaybackGain::Reset() {
 
 void PlaybackGain::SetEnable(bool enable) {
     if (this->enable != enable) {
-        this->enable = enable;
         if (enable) {
             Reset();
         }
+        this->enable = enable;
     }
 }
 
diff --git a/src/viper/effects/PlaybackGain.h b/src/viper/effects/PlaybackGain.h
index 4eb3f8c..6d1e8b7 100644
--- a/src/viper/effects/PlaybackGain.h
+++ b/src/viper/effects/PlaybackGain.h
@@ -7,7 +7,7 @@ class PlaybackGain {
 public:
     PlaybackGain();
 
-    float AnalyseWave(float *samples, uint32_t size);
+    double AnalyseWave(float *samples, uint32_t size);
     void Process(float *samples, uint32_t size);
     void Reset();
     void SetEnable(bool enable);
diff --git a/src/viper/utils/MinPhaseIIRCoeffs.cpp b/src/viper/utils/MinPhaseIIRCoeffs.cpp
index 63b4e26..4d77a17 100644
--- a/src/viper/utils/MinPhaseIIRCoeffs.cpp
+++ b/src/viper/utils/MinPhaseIIRCoeffs.cpp
@@ -2,6 +2,8 @@
 #include "../constants.h"
 #include <cmath>
 
+// Iscle: Verified with latest version at 13/12/2022
+
 static const float MIN_PHASE_IIR_COEFFS_FREQ_10BANDS[] = {
         31.0,
         62.0,
@@ -107,8 +109,8 @@ MinPhaseIIRCoeffs::~MinPhaseIIRCoeffs() {
 
 void MinPhaseIIRCoeffs::Find_F1_F2(double param_2, double param_3, double *param_4, double *param_5) {
     double x = pow(2.0, param_3 / 2.0);
-    *param_5 = param_2 / x;
-    *param_4 = param_2 * x;
+    *param_4 = param_2 / x;
+    *param_5 = param_2 * x;
 }
 
 double *MinPhaseIIRCoeffs::GetCoefficients() {
@@ -132,7 +134,7 @@ float MinPhaseIIRCoeffs::GetIndexFrequency(uint32_t index) {
 
 int MinPhaseIIRCoeffs::SolveRoot(double param_2, double param_3, double param_4, double *param_5) {
     double x = (param_4 - (param_3 * param_3) / (param_2 * 4.0)) / param_2;
-    double y = param_3 / (param_2 * 2.0);
+    double y = param_3 / (param_2 + param_2);
 
     if (x >= 0.0) {
         return -1;
@@ -161,24 +163,24 @@ int MinPhaseIIRCoeffs::UpdateCoeffs(uint32_t bands, uint32_t samplingRate) {
     delete[] this->coeffs;
     this->coeffs = new double[bands * 4](); // TODO: Check this array size, original type: float
 
-    const float *coeffsArray;
+    const float *bandFreqs;
     double tmp;
 
     switch (bands) {
         case 10:
-            coeffsArray = MIN_PHASE_IIR_COEFFS_FREQ_10BANDS;
+            bandFreqs = MIN_PHASE_IIR_COEFFS_FREQ_10BANDS;
             tmp = 3.0 / 3.0;
             break;
         case 15:
-            coeffsArray = MIN_PHASE_IIR_COEFFS_FREQ_15BANDS;
+            bandFreqs = MIN_PHASE_IIR_COEFFS_FREQ_15BANDS;
             tmp = 2.0 / 3.0;
             break;
         case 25:
-            coeffsArray = MIN_PHASE_IIR_COEFFS_FREQ_25BANDS;
+            bandFreqs = MIN_PHASE_IIR_COEFFS_FREQ_25BANDS;
             tmp = 1.0 / 3.0;
             break;
         case 31:
-            coeffsArray = MIN_PHASE_IIR_COEFFS_FREQ_31BANDS;
+            bandFreqs = MIN_PHASE_IIR_COEFFS_FREQ_31BANDS;
             tmp = 1.0 / 3.0;
             break;
     }
@@ -187,9 +189,9 @@ int MinPhaseIIRCoeffs::UpdateCoeffs(uint32_t bands, uint32_t samplingRate) {
         double ret1;
         double ret2;
 
-        Find_F1_F2(coeffsArray[i], tmp, &ret1, &ret2);
+        Find_F1_F2(bandFreqs[i], tmp, &ret2, &ret1);
 
-        double x = (2.0 * M_PI * (double) coeffsArray[i]) / (double) this->samplingRate;
+        double x = (2.0 * M_PI * (double) bandFreqs[i]) / (double) this->samplingRate;
         double y = (2.0 * M_PI * ret2) / (double) this->samplingRate;
 
         double cosX = cos(x);
@@ -197,20 +199,17 @@ int MinPhaseIIRCoeffs::UpdateCoeffs(uint32_t bands, uint32_t samplingRate) {
         double sinY = sin(y);
 
         double a = cosX * cosY;
-        double b = (cosX * cosX) / 2.0;
-        double c = (sinY * sinY);
+        double b = cosX * cosX / 2.0;
+        double c = sinY * sinY;
 
-        // ((b - a) + 0.5) - c
         double d = ((b - a) + 0.5) - c;
-        // c + (((b + (cosY * cosY)) - a) - 0.5)
-        double e = c + (((b + (cosY * cosY)) - a) - 0.5);
-        // (((cosX * cosX) / 8.0 - cosX * cosY / 4.0) + 0.125) - c / 4.0
+        double e = c + (((b + cosY * cosY) - a) - 0.5);
         double f = (((cosX * cosX) * 0.125 - cosX * cosY * 0.25) + 0.125) - c * 0.25;
 
         if (SolveRoot(d, e, f, &ret1) == 0) {
-            this->coeffs[4 * i] = ret1 * 2.0;
-            this->coeffs[4 * i + 1] = ((0.5 - ret1) * 0.5) * 2.0;
-            this->coeffs[4 * i + 2] = ((ret1 + 0.5) * cosX) * 2.0;
+            this->coeffs[i * 4] = ret1 + ret1;
+            this->coeffs[i * 4 + 1] = 0.5 - ret1;
+            this->coeffs[i * 4 + 2] = (ret1 + 0.5) * cosX * 2.0;
         }
     }
 
diff --git a/src/viper/utils/MinPhaseIIRCoeffs.h b/src/viper/utils/MinPhaseIIRCoeffs.h
index 78ac99b..df5e857 100644
--- a/src/viper/utils/MinPhaseIIRCoeffs.h
+++ b/src/viper/utils/MinPhaseIIRCoeffs.h
@@ -2,18 +2,21 @@
 
 #include <cstdint>
 
+// Iscle: Verified with latest version at 13/12/2022
+
 class MinPhaseIIRCoeffs {
 public:
     MinPhaseIIRCoeffs();
     ~MinPhaseIIRCoeffs();
 
-    void Find_F1_F2(double param_2, double param_3, double *param_4, double *param_5);
     double *GetCoefficients();
     float GetIndexFrequency(uint32_t param_1);
-    int SolveRoot(double param_2, double param_3, double param_4, double *param_5);
     int UpdateCoeffs(uint32_t bands, uint32_t samplingRate);
 
 private:
+    void Find_F1_F2(double param_2, double param_3, double *param_4, double *param_5);
+    int SolveRoot(double param_2, double param_3, double param_4, double *param_5);
+
     double *coeffs;
     uint32_t samplingRate;
     uint32_t bands;
diff --git a/src/viper/utils/PConvSingle.cpp b/src/viper/utils/PConvSingle.cpp
index bb3575c..455f544 100644
--- a/src/viper/utils/PConvSingle.cpp
+++ b/src/viper/utils/PConvSingle.cpp
@@ -59,13 +59,13 @@ int PConvSingle::LoadKernel(float *buf, int param_2, int segmentSize) {
 
 int PConvSingle::LoadKernel(const float *param_2,float param_3,int param_4,int param_5) {
 //    if (buf != nullptr && param_5 > 0 && segmentSize > 0 && segmentSize % 2 == 0) {
-//        this->enabled = false;
+//        this->enable = false;
 //        ReleaseResources();
 ////        this->data = new PConvData(); //(PConvData *) malloc(0x140);  // TODO: Sizeof
 //        this->segmentSize = segmentSize;
 //        int n = ProcessKernel(1, param_2, param_4, param_5);
 //        if (n != 0) {
-//            this->enabled = true;
+//            this->enable = true;
 //            return n;
 //        }
 //        ReleaseResources();