diff --git a/dsp_types.hpp b/common/dsp_types.hpp
similarity index 100%
rename from dsp_types.hpp
rename to common/dsp_types.hpp
diff --git a/mix.hpp b/common/mix.hpp
similarity index 66%
rename from mix.hpp
rename to common/mix.hpp
index 8007d6a..faf5003 100644
--- a/mix.hpp
+++ b/common/mix.hpp
@@ -1,10 +1,7 @@
-#include "delay/buffer_multi.hpp"
-#include <cmath>
-
 #ifndef MIX_HPP
 #define MIX_HPP
 
-#include <delay/buffer.hpp>
+#include <cmath>
 
 // Use like `Householder<double, 8>::inPlace(data)` - size must be ≥ 1
 template<typename Sample, int size>
@@ -69,22 +66,22 @@ class Hadamard
 	}
 };
 
-template<typename T>
+template<typename T, uint numCh>
 class Shuffle
 {
 	public: 
-	static inline void outOfPlace(dsp::Buffer<T> &in, dsp::Buffer<T> &out, dsp::Buffer<T> &shuffle_spec)
+	static inline void outOfPlace(T *in, T *out, const int *shuffle_spec)
 	{
-		for (int c=0; c < shuffle_spec.capacity(); c++)
+		for (int c=0; c < numCh; c++)
 		{
 			T sign = 1;
-			int s = (int)shuffle_spec[c];
+			int s = shuffle_spec[c];
 			if (s < 0)
 			{
 				sign = -1;
 				s *= -1;
 			}
-			if (s >= shuffle_spec.capacity())
+			if (s >= numCh)
 			{
 				s = 0;
 			}
@@ -92,28 +89,6 @@ class Shuffle
 			out[s] = sign * in[c];
 		}
 	};
-	static inline void outOfPlace(dsp::BufferMulti<T> &in, dsp::BufferMulti<T> &out, dsp::Buffer<T> &shuffle_spec)
-	{
-		for (int c=0; c < shuffle_spec.capacity(); c++)
-		{
-			T sign = 1;
-			int s = (int)shuffle_spec[c];
-			if (s < 0)
-			{
-				sign = -1;
-				s *= -1;
-			}
-			if (s >= shuffle_spec.capacity())
-			{
-				s = 0;
-			}
-
-			for (int n=0; n < in.capacity(); n++)
-			{
-				out[c][n] = sign * in[s][n];
-			}
-		}
-	};
 };
 
 #endif
diff --git a/delay/buffer.hpp b/delay/buffer.hpp
index 613e98f..b454173 100644
--- a/delay/buffer.hpp
+++ b/delay/buffer.hpp
@@ -27,12 +27,10 @@
 #define DSP_BUFFER_H
 
 #include <vector>
-#include <list>
 #include <cstddef>
 #include <math.h>
 #include <stdint.h>
 #include <sys/types.h>
-#include <dsp_types.hpp>
 
 namespace dsp {
 
diff --git a/delay/buffer_multi.hpp b/delay/buffer_multi.hpp
index 9eab0cd..7a2ffea 100644
--- a/delay/buffer_multi.hpp
+++ b/delay/buffer_multi.hpp
@@ -27,23 +27,22 @@
 #define DSP_BUFFER_MULTI_H
 
 #include "buffer.hpp"
+#include <array>
 
 namespace dsp {
 
-template <typename T>
+template <typename T, uint numCh>
 class BufferMulti
 {
 	Buffer<T> *m_buffer;
-	uint m_numChannels;
 	size_t m_capacity;
 
 	public:
-	BufferMulti(size_t numChannels, size_t capacity)
-	: m_buffer(new Buffer<T>[numChannels])
-	, m_numChannels(numChannels)
+	BufferMulti(size_t capacity)
+	: m_buffer(new Buffer<T>[numCh])
 	, m_capacity(capacity)
 	{
-		for (int c=0; c < numChannels; c++)
+		for (int c=0; c < numCh; c++)
 		{
 			m_buffer[c].resize(capacity);
 		}
@@ -56,7 +55,7 @@ class BufferMulti
 
 	void reset()
 	{
-		for (int c=0; c < m_numChannels; c++)
+		for (int c=0; c < numCh; c++)
 		{
 			m_buffer[c].reset();
 		}
@@ -69,7 +68,7 @@ class BufferMulti
 
 	size_t numChannels()
 	{
-		return m_numChannels;
+		return numCh;
 	}
 
 	Buffer<T> operator[](uint channel)
@@ -84,7 +83,7 @@ class BufferMulti
 
 	BufferMulti & operator ++() 
 	{
-		for (int c=0; c < m_numChannels; c++)
+		for (int c=0; c < numCh; c++)
 		{
 			++(m_buffer[c]);
 		}
@@ -93,7 +92,7 @@ class BufferMulti
 
 	BufferMulti & operator +=(int i) 
 	{
-		for (int c=0; c < m_numChannels; c++)
+		for (int c=0; c < numCh; c++)
 		{
 			m_buffer[c] += i;
 		}
@@ -102,7 +101,7 @@ class BufferMulti
 
 	BufferMulti & operator --() 
 	{
-		for (int c=0; c < m_numChannels; c++)
+		for (int c=0; c < numCh; c++)
 		{
 			--(m_buffer[c]);
 		}
@@ -111,68 +110,37 @@ class BufferMulti
 
 	BufferMulti & operator -=(int i) 
 	{
-		for (int c=0; c < m_numChannels; c++)
+		for (int c=0; c < numCh; c++)
 		{
 			m_buffer[c] -= i;
 		}
 		return *this;
 	}
 
-	BufferMulti & operator = (const T& value) 
+	BufferMulti & operator =(const T& value) 
 	{
-		for (uint c=0; c < m_numChannels; c++)
+		for (uint c=0; c < numCh; c++)
 		{
 			m_buffer[c][0] = value;
 		}
 		return *this;
 	}
 
-	dsp::Buffer<T> quer(int offset=0)
+	void quer(T *out, int offset=0) const
 	{
-		Buffer<T> querBuffer(numChannels());
-		for (int c=0; c < m_numChannels; c++)
+		for (int c=0; c < numCh; c++)
 		{
-			querBuffer[c] = m_buffer[c][offset];
+			out[c] = m_buffer[c][offset];
 		}
-		return querBuffer;
 	}
 
-	const dsp::Buffer<T> quer(int offset=0) const
+	void quer(T *out, const int *offsets) const
 	{
-		Buffer<T> querBuffer(numChannels());
-		for (int c=0; c < m_numChannels; c++)
+		for (int c=0; c < numCh; c++)
 		{
-			querBuffer[c] = m_buffer[c][offset];
+			out[c] = m_buffer[c][offsets[c]];
 		}
-		return querBuffer;
 	}
-
-	dsp::Buffer<T> quer(std::initializer_list<int> offsets)
-	{
-		Buffer<T> querBuffer(offsets.size());
-		
-		uint ch = 0;
-		for (int offset: offsets)
-		{
-			querBuffer[ch] = m_buffer[ch][offset];
-			ch++;
-		}
-		return querBuffer;
-	}
-
-	const dsp::Buffer<T> quer(std::initializer_list<int> offsets) const
-	{
-		Buffer<T> querBuffer(offsets.size());
-		
-		uint ch = 0;
-		for (int offset: offsets)
-		{
-			querBuffer[ch] = m_buffer[ch][offset];
-			ch++;
-		}
-		return querBuffer;
-	}
-
 	
 	Buffer<T> at(uint channel)
 	{
diff --git a/delay/tests/test_mix.cpp b/delay/tests/test_mix.cpp
deleted file mode 100644
index d99259e..0000000
--- a/delay/tests/test_mix.cpp
+++ /dev/null
@@ -1,121 +0,0 @@
-#include "delay/buffer_multi.hpp"
-#include "test_common.hpp"
-#include <delay/buffer.hpp>
-#include <mix.hpp>
-
-#include <cstdio>
-#include <iostream>
-#include <ostream>
-
-
-int test_mix_1()
-{
-	std::cout << "----------------------------------------------" << std::endl;
-	std::cout << "Start test_mix_1::shuffle" << std::endl;
-	std::cout << "----------------------------------------------" << std::endl;
-
-	{
-		dsp::Buffer<int> r_buf(5);
-		dsp::Buffer<int> t_buf{105, 106, 107, 108, 109};
-		t_buf = {105, 106, 107, 108, 109};
-
-		dsp::Buffer<int> s_spec = {1, 3, 2, 4, 0};
-		Shuffle<int>::outOfPlace(t_buf, r_buf, s_spec);
-		print(r_buf, 5, "r-buf");
-	}
-	{
-		dsp::BufferMulti<int> r_buf(5, 5);
-		dsp::BufferMulti<int> t_buf{5, 5};
-		t_buf[0] = {105, 106, 107, 108, 109};
-		t_buf[1] = {205, 206, 207, 208, 209};
-		t_buf[2] = {305, 306, 307, 308, 309};
-		t_buf[3] = {405, 406, 407, 408, 409};
-		t_buf[4] = {505, 506, 507, 508, 509};
-		print(t_buf[0], 5, "t-buf 0");
-		print(t_buf[1], 5, "t-buf 1");
-
-		dsp::Buffer<int> s_spec = {-1, 0, -3, 2, -4};
-		Shuffle<int>::outOfPlace(t_buf, r_buf, s_spec);
-		print(r_buf[0], 5, "r-buf 0");
-		print(r_buf[1], 5, "r-buf 1");
-		print(r_buf[2], 5, "r-buf 2");
-		print(r_buf[3], 5, "r-buf 3");
-		print(r_buf[4], 5, "r-buf 4");
-	}
-	return 0;
-}
-
-int test_mix_2()
-{
-	dsp::BufferMulti<int> r_buf(5, 20);
-
-	for (int i=0; i < 20; i++)
-	{
-		r_buf = 100 +i ;
-		++r_buf;
-	}
-
-	r_buf.reset();
-	for (int c=0; c < r_buf.numChannels(); c++)
-	{
-		print(r_buf[c], 20, "r-buf");
-		std::cout << "----------------------------------------------" << std::endl;
-	}
-
-	for (int c=0; c < r_buf.numChannels(); c++)
-	{
-		dsp::Buffer<int> v(r_buf[c], c);
-		print(v, 20, "v-buf");
-		std::cout << "----------------------------------------------" << std::endl;
-	}
-
-	return 0;
-}
-
-int test_mix_3()
-{
-	const int nCh = 5;
-	dsp::BufferMulti<double> r_buf(nCh, 10);
-	for (int i=0; i < r_buf.capacity(); i++)
-	{
-		r_buf = (double)i/10 ;
-		++r_buf;
-	}
-//	r_buf.reset();
-
-	dsp::Buffer<double> qbuf(r_buf.quer({-2, -10, -4, 3, -3}));
-	dsp::Buffer<double> sbuf(nCh);
-	dsp::Buffer<double> s_spec = {-1, 0, -3, 2, -4};
-	Shuffle<double>::outOfPlace(qbuf, sbuf, s_spec);
-
-	double *q = sbuf.raw();
-
-	for (int i=0; i < nCh; i++)
-	{
-		std::cout << q[i] << " ";
-	}
-	std::cout << std::endl;
-
-	Hadamard<double, nCh>::inPlace(q);
-	for (int i=0; i < nCh; i++)
-	{
-		std::cout << q[i] << " ";
-	}
-	std::cout << std::endl;
-
-	Householder<double, nCh>::inPlace(q);
-	for (int i=0; i < nCh; i++)
-	{
-		std::cout << q[i] << " ";
-	}
-	std::cout << std::endl;
-	return 0;
-}
-
-int test_mix()
-{
-	test_mix_1();
-	test_mix_2();
-	test_mix_3();
-	return 0;
-}
\ No newline at end of file
diff --git a/reverb/reverb.hpp b/reverb/reverb.hpp
new file mode 100644
index 0000000..c45e25b
--- /dev/null
+++ b/reverb/reverb.hpp
@@ -0,0 +1,106 @@
+#ifndef REVERB_H
+#define REVERB_H
+
+#include <cstdlib>
+#include <delay/buffer_multi.hpp>
+#include <common/mix.hpp>
+
+template<typename T, size_t numCh>
+class Diffusor
+{
+	dsp::BufferMulti<T, numCh> m_dly;
+	int m_delay_spec[numCh];
+	int m_shuffle_spec[numCh];
+
+	public:
+	Diffusor(uint maxDelaySize)
+	: m_dly(maxDelaySize)
+	{
+		float delayRagePerWindow = (float)maxDelaySize/(float)numCh;
+
+		// Delay spec
+		for (int i=0; i < numCh; i++)
+		{
+			float base_delay = i*delayRagePerWindow;
+			float z = (float)rand()/(float)RAND_MAX;
+			int delay = (int)(base_delay + z*delayRagePerWindow);
+
+			m_delay_spec[i] = -delay;
+		}
+
+		// Shuffle spec
+		for (int i=0; i < numCh; i++)
+		{
+			m_shuffle_spec[i] = i;
+		}
+
+		// Shuffle values
+		for (int i=0; i < 2*numCh; i++)
+		{
+			int i1 = rand() & (numCh-1);
+			int i2 = rand() & (numCh-1);
+			int temp = m_shuffle_spec[i1];
+			m_shuffle_spec[i1] = m_shuffle_spec[i2];
+			m_shuffle_spec[i2] = temp;
+		}
+
+		// Shuffle signs
+		float p = 0.3;
+		for (int i=0; i < numCh; i++)
+		{
+			float z = (float)rand()/(float)RAND_MAX;
+			if (z <= p)
+			{
+				m_shuffle_spec[i] *= (T)-1;
+			}
+		}
+
+	}
+
+	inline T process(T in)
+	{
+		m_dly = in;
+
+		T qbuf[numCh];
+		m_dly.quer(qbuf, m_delay_spec);
+
+		T sbuf[numCh];
+		Shuffle<T, numCh>::outOfPlace(qbuf, sbuf, m_shuffle_spec);
+
+		Hadamard<T, numCh>::inPlace(sbuf);
+		Householder<T, numCh>::inPlace(sbuf);
+		++m_dly;
+
+		return sbuf[0];
+
+	}
+
+};
+
+template<typename T, uint numCh>
+class Reverb
+{
+	std::array<Diffusor<T, numCh>, 3> m_diffusors;
+
+	public:
+	Reverb(uint maxDelay)
+	: m_diffusors({maxDelay, maxDelay, maxDelay})
+	{
+
+	}
+
+	void process(float *in, float *out, unsigned numPoints)
+	{
+		for (int i=0; i < numPoints; i++)
+		{
+			T temp = in[i];
+			for (auto diffusor: m_diffusors)
+			{
+				temp = diffusor.process(temp);
+			}
+			out[i] = temp;
+		}
+	}
+};
+
+#endif
diff --git a/delay/tests/.gitignore b/tests/.gitignore
similarity index 100%
rename from delay/tests/.gitignore
rename to tests/.gitignore
diff --git a/delay/tests/Makefile b/tests/Makefile
similarity index 88%
rename from delay/tests/Makefile
rename to tests/Makefile
index 183f62c..2519246 100644
--- a/delay/tests/Makefile
+++ b/tests/Makefile
@@ -11,7 +11,7 @@ TARGET ?= $(NAME)
 
 CXXFLAGS += -std=c++20
 
-INCLUDES += -I $(realpath .) -I $(realpath ../../)
+INCLUDES += -I $(realpath .) -I $(realpath ../)
 
 CXX_SRCS := test_main.cpp test_buffer.cpp test_buffer_multi.cpp test_mix.cpp
 
diff --git a/delay/tests/test_buffer.cpp b/tests/test_buffer.cpp
similarity index 99%
rename from delay/tests/test_buffer.cpp
rename to tests/test_buffer.cpp
index 25bc857..ba1f3d1 100644
--- a/delay/tests/test_buffer.cpp
+++ b/tests/test_buffer.cpp
@@ -3,7 +3,6 @@
 #include <cstdio>
 
 #include <iostream>
-#include <vector>
 
 
 int test_buffer_1()
diff --git a/delay/tests/test_buffer_multi.cpp b/tests/test_buffer_multi.cpp
similarity index 89%
rename from delay/tests/test_buffer_multi.cpp
rename to tests/test_buffer_multi.cpp
index 9c130ab..31ec0d0 100644
--- a/delay/tests/test_buffer_multi.cpp
+++ b/tests/test_buffer_multi.cpp
@@ -13,7 +13,7 @@ int test_buffer_multi_1()
 	std::cout << "Start test_buffer_multi_1()" << std::endl;
 	std::cout << "----------------------------------------------" << std::endl;
 
-	dsp::BufferMulti<int>buffer(5, 10);
+	dsp::BufferMulti<int, 5>buffer(10);
 	printf("Buffer capacity = %zu\n", buffer.capacity());
 
 	for (int i=0; i < 10; i++)
@@ -49,7 +49,7 @@ int test_buffer_multi_2()
 	std::cout << "Start test_buffer_multi_2()" << std::endl;
 	std::cout << "----------------------------------------------" << std::endl;
 
-	dsp::BufferMulti<int>buffer(5, 3);
+	dsp::BufferMulti<int, 5>buffer(3);
 	printf("Buffer capacity = %zu\n", buffer.capacity());
 
 	for (int i=0; i < 10; i++)
@@ -84,7 +84,7 @@ int test_buffer_multi_3()
 	std::cout << "Start test_buffer_multi_3()" << std::endl;
 	std::cout << "----------------------------------------------" << std::endl;
 
-	dsp::BufferMulti<int>buffer(5, 10);
+	dsp::BufferMulti<int, 5>buffer(10);
 	printf("Buffer capacity = %zu\n", buffer.capacity());
 
 	for (int i=0; i < 20; i++)
@@ -105,7 +105,7 @@ int test_buffer_multi_4()
 	std::cout << "Start test_buffer_multi_4()" << std::endl;
 	std::cout << "----------------------------------------------" << std::endl;
 
-	dsp::BufferMulti<int>buffer(5, 10);
+	dsp::BufferMulti<int, 5>buffer(10);
 	printf("Buffer capacity = %zu\n", buffer.capacity());
 
 	dsp::Buffer<int> *mbv[6];
@@ -126,7 +126,7 @@ int test_buffer_multi_4()
 	buffer.reset();
 	for (int c=0; c < 5; c++)
 	{
-		print(*mbv[c], 10, "mbv[c]");
+		print(*mbv[c], 10);
 	}
 	return 0;
 }
@@ -137,7 +137,7 @@ int test_buffer_multi_5()
 	std::cout << "Start test_buffer_multi_5()" << std::endl;
 	std::cout << "----------------------------------------------" << std::endl;
 
-	dsp::BufferMulti<int>buffer(5, 10);
+	dsp::BufferMulti<int, 5>buffer(10);
 	printf("Buffer capacity = %zu\n", buffer.capacity());
 
 	for (int i=0; i < 10; i++)
@@ -149,7 +149,9 @@ int test_buffer_multi_5()
 	buffer.reset();
 	for (int i=0; i < 10; i++)
 	{
-		print(buffer.quer(i), buffer.quer().capacity(), "Title here 5");
+		int qbuf[5];
+		buffer.quer(qbuf, i);
+		print(qbuf, 5);
 	}
 
 	return 0;
@@ -161,7 +163,7 @@ int test_buffer_multi_6()
 	std::cout << "Start test_buffer_multi_6()" << std::endl;
 	std::cout << "----------------------------------------------" << std::endl;
 
-	dsp::BufferMulti<int>buffer(5, 10);
+	dsp::BufferMulti<int, 5>buffer(10);
 	printf("Buffer capacity = %zu\n", buffer.capacity());
 
 	for (int i=0; i < 10; i++)
@@ -171,9 +173,12 @@ int test_buffer_multi_6()
 	}
 
 	buffer.reset();
+	int qbuf[5];
+	int delays[] = {-2, -1, -4, -5, 0};
 	for (int i=0; i < 10; i++)
 	{
-		print(buffer.quer({-2, -1, -4, -5, 0}), buffer.quer().capacity(), "Title here 6");
+		buffer.quer(qbuf, delays);
+		print(qbuf, 5);
 		buffer += 1;
 	}
 
diff --git a/delay/tests/test_common.hpp b/tests/test_common.hpp
similarity index 70%
rename from delay/tests/test_common.hpp
rename to tests/test_common.hpp
index 66735b8..f6e4c1d 100644
--- a/delay/tests/test_common.hpp
+++ b/tests/test_common.hpp
@@ -10,10 +10,18 @@
 #define TEST_COMMON_H
 
 template<typename T>
-void print(const dsp::Buffer<T> &v, size_t size, std::string name=std::string(""))
+void print(const dsp::Buffer<T> &v, size_t size)
+{
+	for(int i=0; i < size; i++)
+	{
+		std::cout << v[i] << " ";
+	}
+	std::cout << std::endl;
+}
+
+template<typename T>
+void print(T *v, size_t size)
 {
-	std::cout << "----------------------------------------------" << std::endl;
-	std::cout << "- " << name << ", " << size << std::endl;
 	for(int i=0; i < size; i++)
 	{
 		std::cout << v[i] << " ";
@@ -50,8 +58,10 @@ void check(const dsp::Buffer<T> &target, const dsp::Buffer<T> &actual, size_t si
 	if (!success)
 	{
 		std::cout << "Check failed" << std::endl;
-		print(target, target.capacity(), "Target");
-		print(actual, actual.capacity(), "Actual");
+		std::cout << "Target" << std::endl;
+		print(target, target.capacity());
+		std::cout << "Actual" << std::endl;
+		print(actual, actual.capacity());
 	}
 	assert(success);
 }
diff --git a/delay/tests/test_main.cpp b/tests/test_main.cpp
similarity index 100%
rename from delay/tests/test_main.cpp
rename to tests/test_main.cpp
diff --git a/tests/test_mix.cpp b/tests/test_mix.cpp
new file mode 100644
index 0000000..3ac0e9d
--- /dev/null
+++ b/tests/test_mix.cpp
@@ -0,0 +1,157 @@
+#include "delay/buffer_multi.hpp"
+#include "test_common.hpp"
+#include <delay/buffer.hpp>
+#include <common/mix.hpp>
+#include <reverb/reverb.hpp>
+
+#include <cstdio>
+#include <iostream>
+#include <ostream>
+
+
+int test_mix_1()
+{
+	std::cout << "----------------------------------------------" << std::endl;
+	std::cout << "Start test_mix_1::shuffle" << std::endl;
+	std::cout << "----------------------------------------------" << std::endl;
+	const int numCh = 5;
+	{
+		dsp::Buffer<int> r_buf(5);
+		dsp::Buffer<int> t_buf{105, 106, 107, 108, 109};
+		t_buf = {105, 106, 107, 108, 109};
+
+		int s_spec[numCh] = {1, 3, 2, 4, 0};
+		int sbuf[numCh];
+		Shuffle<int, numCh>::outOfPlace(t_buf.raw(), sbuf, s_spec);
+		print(r_buf, 5);
+	}
+	{
+		int sbuf[numCh];
+		int s_spec[numCh] = {-1, 0, -3, 2, -4};
+
+		dsp::BufferMulti<int, 5> r_buf(5);
+		dsp::BufferMulti<int, 5> t_buf{5};
+		t_buf[0] = {105, 106, 107, 108, 109};
+		t_buf[1] = {205, 206, 207, 208, 209};
+		t_buf[2] = {305, 306, 307, 308, 309};
+		t_buf[3] = {405, 406, 407, 408, 409};
+		t_buf[4] = {505, 506, 507, 508, 509};
+		print(t_buf[0], 5);
+		print(t_buf[1], 5);
+
+		for (int i=0; i < numCh; i++)
+		{
+			Shuffle<int, numCh>::outOfPlace(t_buf[i].raw(), sbuf, s_spec);
+			print(r_buf[i], 5);
+		}
+	}
+	return 0;
+}
+
+int test_mix_2()
+{
+	dsp::BufferMulti<int, 5> r_buf(20);
+
+	for (int i=0; i < 20; i++)
+	{
+		r_buf = 100 +i ;
+		++r_buf;
+	}
+
+	r_buf.reset();
+	for (int c=0; c < r_buf.numChannels(); c++)
+	{
+		print(r_buf[c], 20);
+		std::cout << "----------------------------------------------" << std::endl;
+	}
+
+	for (int c=0; c < r_buf.numChannels(); c++)
+	{
+		dsp::Buffer<int> v(r_buf[c], c);
+		print(v, 20);
+		std::cout << "----------------------------------------------" << std::endl;
+	}
+
+	return 0;
+}
+
+int test_mix_3()
+{
+	const int nCh = 5;
+	dsp::BufferMulti<double, nCh> r_buf(10);
+	for (int i=0; i < r_buf.capacity(); i++)
+	{
+		r_buf = (double)i/10 ;
+		++r_buf;
+	}
+//	r_buf.reset();
+	double sbuf[nCh];
+	double qbuf[nCh];
+	int delays[nCh] = {-2, -10, -4, 3, -3};
+	r_buf.quer(qbuf, delays);
+	int s_spec[nCh] = {-1, 0, -3, 2, -4};
+
+	Shuffle<double, nCh>::outOfPlace(qbuf, sbuf, s_spec);
+
+	for (int i=0; i < nCh; i++)
+	{
+		std::cout << sbuf[i] << " ";
+	}
+	std::cout << std::endl;
+
+	Hadamard<double, nCh>::inPlace(sbuf);
+	for (int i=0; i < nCh; i++)
+	{
+		std::cout << sbuf[i] << " ";
+	}
+	std::cout << std::endl;
+
+	Householder<double, nCh>::inPlace(sbuf);
+	for (int i=0; i < nCh; i++)
+	{
+		std::cout << sbuf[i] << " ";
+	}
+	std::cout << std::endl;
+	return 0;
+}
+
+void test_diffusor()
+{
+	std::cout << "----------------------------------------------" << std::endl;
+	std::cout << "test_diffusor()" << std::endl;
+
+	Diffusor<double, 8> diff(5);
+
+	double data_in[10] = {0.1, 0.2, 0.3, 0.4, 0.5, 0.6, 0.7,0.8, 0.9, 1.0};
+	double data_out[10] = {0, 0, 0, 0, 0, 0, 0,0, 0, 0};
+	for (int i=0; i < 10; i++)
+	{
+		data_out[i] = diff.process(data_in[i]);
+	}
+	print(data_out, 10);
+}
+
+void test_reverb()
+{
+	std::cout << "----------------------------------------------" << std::endl;
+	std::cout << "test_reverb()" << std::endl;
+
+	Reverb<double, 8> rev(32);
+
+	float data_in[10] = {1, 2, 3, 4, 5, 6, 7,8, 9, 10};
+	float data_out[10] = {0, 0, 0, 0, 0, 0, 0,0, 0, 0};
+	rev.process(data_in, data_out, 10);
+	print(data_out, 10);
+
+}
+
+int test_mix()
+{
+	test_mix_1();
+	test_mix_2();
+	test_mix_3();
+	test_reverb();
+	test_diffusor();
+	return 0;
+}
+