diff --git a/src/ViPER4Android.cpp b/src/ViPER4Android.cpp
index d3a917b..e2bac23 100644
--- a/src/ViPER4Android.cpp
+++ b/src/ViPER4Android.cpp
@@ -184,7 +184,7 @@ static int32_t handleGetParam(ViperContext *pContext, effect_param_t *pCmdParam,
             struct timeval time{};
             gettimeofday(&time, nullptr);
 
-            uint64_t currentMs = (time.tv_sec * 1000) + (time.tv_usec / 1000);
+            uint64_t currentMs = (uint64_t) (time.tv_sec * 1000) + (uint64_t) (time.tv_usec / 1000);
             uint64_t lastProcessTime = pContext->viper->processTimeMs;
 
             uint64_t diff;
diff --git a/src/viper/ViPER.cpp b/src/viper/ViPER.cpp
index e13ea87..99e1f37 100644
--- a/src/viper/ViPER.cpp
+++ b/src/viper/ViPER.cpp
@@ -148,7 +148,7 @@ void ViPER::processBuffer(float *buffer, uint32_t size) {
     if (this->updateProcessTime) {
         struct timeval time{};
         gettimeofday(&time, nullptr);
-        this->processTimeMs = time.tv_sec * 1000 + time.tv_usec / 1000;
+        this->processTimeMs = (uint64_t) (time.tv_sec * 1000) + (uint64_t) (time.tv_usec / 1000);
     }
 
     uint32_t ret;
diff --git a/src/viper/effects/VHE.h b/src/viper/effects/VHE.h
index c338618..f547314 100644
--- a/src/viper/effects/VHE.h
+++ b/src/viper/effects/VHE.h
@@ -21,7 +21,7 @@ public:
     uint32_t samplingRate;
     bool enabled;
     int effectLevel;
-    int convSize;
+    uint32_t convSize;
 };
 
 
diff --git a/src/viper/effects/ViPERDDC.cpp b/src/viper/effects/ViPERDDC.cpp
index 0ff2b00..0fada82 100644
--- a/src/viper/effects/ViPERDDC.cpp
+++ b/src/viper/effects/ViPERDDC.cpp
@@ -1,33 +1,140 @@
 #include "ViPERDDC.h"
+#include "../../log.h"
+#include <cstring>
 
 ViPERDDC::ViPERDDC() {
-
+    this->enable = false;
+    this->samplingRate = 44100;
+    this->setCoeffsOk = false;
+    this->arrSize = 0;
+    this->arrPtr44100 = nullptr;
+    this->arrPtr48000 = nullptr;
+    this->arr4 = nullptr;
+    this->arr3 = nullptr;
+    this->arr2 = nullptr;
+    this->arr1 = nullptr;
+    this->arr8 = nullptr;
+    this->arr7 = nullptr;
+    this->arr6 = nullptr;
+    this->arr5 = nullptr;
 }
 
 ViPERDDC::~ViPERDDC() {
-
+    ReleaseResources();
 }
 
 void ViPERDDC::Process(float *samples, uint32_t size) {
+    if (!this->setCoeffsOk) return;
+    if (!this->enable) return;
 
+    switch (this->samplingRate) {
+        case 44100: {
+            break;
+        }
+        case 48000: {
+            break;
+        }
+        default: {
+            VIPER_LOGD("ViPERDDC::Process() -> Invalid sampling rate: %d", this->samplingRate);
+        }
+    }
 }
 
 void ViPERDDC::ReleaseResources() {
+    for (uint32_t i = 0; i < this->arrSize; i++) {
+        delete[] this->arrPtr44100[i];
+        delete[] this->arrPtr48000[i];
+    }
 
+    delete[] this->arrPtr44100;
+    this->arrPtr44100 = nullptr;
+
+    delete[] this->arrPtr48000;
+    this->arrPtr48000 = nullptr;
+
+    delete[] this->arr1;
+    this->arr1 = nullptr;
+
+    delete[] this->arr2;
+    this->arr2 = nullptr;
+
+    delete[] this->arr3;
+    this->arr3 = nullptr;
+
+    delete[] this->arr4;
+    this->arr4 = nullptr;
+
+    delete[] this->arr5;
+    this->arr5 = nullptr;
+
+    delete[] this->arr6;
+    this->arr6 = nullptr;
+
+    delete[] this->arr7;
+    this->arr7 = nullptr;
+
+    delete[] this->arr8;
+    this->arr8 = nullptr;
+
+    this->setCoeffsOk = false;
 }
 
 void ViPERDDC::Reset() {
+    if (!this->setCoeffsOk) return;
+    if (this->arrSize == 0) return;
 
+    memset(this->arr1, 0, this->arrSize * 4);
+    memset(this->arr2, 0, this->arrSize * 4);
 }
 
-void ViPERDDC::SetCoeffs() {
+void ViPERDDC::SetCoeffs(uint32_t param_1, float *param_2, float *param_3) {
+    ReleaseResources();
 
+    if (param_1 == 0) return;
+
+    this->arrSize = param_1 / 5;
+    this->arrPtr44100 = new float *[this->arrSize]();
+    this->arrPtr48000 = new float *[this->arrSize]();
+
+    for (uint32_t i = 0; i < this->arrSize; i++) {
+        this->arrPtr44100[i] = new float[5];
+        this->arrPtr44100[i][0] = param_2[i * 5];
+        this->arrPtr44100[i][1] = param_2[i * 5 + 1];
+        this->arrPtr44100[i][2] = param_2[i * 5 + 2];
+        this->arrPtr44100[i][3] = param_2[i * 5 + 3];
+        this->arrPtr44100[i][4] = param_2[i * 5 + 4];
+
+        this->arrPtr48000[i] = new float[5];
+        this->arrPtr48000[i][0] = param_3[i * 5];
+        this->arrPtr48000[i][1] = param_3[i * 5 + 1];
+        this->arrPtr48000[i][2] = param_3[i * 5 + 2];
+        this->arrPtr48000[i][3] = param_3[i * 5 + 3];
+        this->arrPtr48000[i][4] = param_3[i * 5 + 4];
+    }
+
+    this->arr1 = new float[this->arrSize]();
+    this->arr2 = new float[this->arrSize]();
+    this->arr3 = new float[this->arrSize]();
+    this->arr4 = new float[this->arrSize]();
+    this->arr5 = new float[this->arrSize]();
+    this->arr6 = new float[this->arrSize]();
+    this->arr7 = new float[this->arrSize]();
+    this->arr8 = new float[this->arrSize]();
+    this->setCoeffsOk = true;
 }
 
 void ViPERDDC::SetEnable(bool enable) {
-
+    if (this->enable != enable) {
+        this->enable = enable;
+        if (enable) {
+            Reset();
+        }
+    }
 }
 
 void ViPERDDC::SetSamplingRate(uint32_t samplingRate) {
-
+    if (this->samplingRate != samplingRate) {
+        this->samplingRate = samplingRate;
+        Reset();
+    }
 }
diff --git a/src/viper/effects/ViPERDDC.h b/src/viper/effects/ViPERDDC.h
index 98edd5f..31ecb29 100644
--- a/src/viper/effects/ViPERDDC.h
+++ b/src/viper/effects/ViPERDDC.h
@@ -10,9 +10,25 @@ public:
     void Process(float *samples, uint32_t size);
     void ReleaseResources();
     void Reset();
-    void SetCoeffs();
+    void SetCoeffs(uint32_t param_1, float *param_2, float *param_3);
     void SetEnable(bool enable);
     void SetSamplingRate(uint32_t samplingRate);
+
+private:
+    bool enable;
+    bool setCoeffsOk;
+    uint32_t samplingRate;
+    uint32_t arrSize;
+    float **arrPtr44100;
+    float **arrPtr48000;
+    float *arr1;
+    float *arr2;
+    float *arr3;
+    float *arr4;
+    float *arr5;
+    float *arr6;
+    float *arr7;
+    float *arr8;
 };
 
 
diff --git a/src/viper/utils/NoiseSharpening.h b/src/viper/utils/NoiseSharpening.h
index 21c3537..5af4752 100644
--- a/src/viper/utils/NoiseSharpening.h
+++ b/src/viper/utils/NoiseSharpening.h
@@ -17,7 +17,7 @@ public:
 
     IIR_1st filters[2];
     float in[2];
-    int32_t samplingRate;
+    uint32_t samplingRate;
     float gain;
 };
 
diff --git a/src/viper/utils/TimeConstDelay.cpp b/src/viper/utils/TimeConstDelay.cpp
index ec23189..27fb944 100644
--- a/src/viper/utils/TimeConstDelay.cpp
+++ b/src/viper/utils/TimeConstDelay.cpp
@@ -15,7 +15,7 @@ float TimeConstDelay::ProcessSample(float sample) {
     if (this->samples != nullptr) {
         float val = this->samples[this->offset];
         this->samples[this->offset] = sample;
-        this->offset = (int) modf((float) this->offset + 1, (float *) &this->sampleCount); // TODO: check if this is correct
+        this->offset = (uint32_t) modf((float) this->offset + 1, (float *) &this->sampleCount); // TODO: check if this is correct
         return val;
     }
     return 0.0;