diff --git a/.gitignore b/.gitignore
index aa7dccb..85151b9 100755
--- a/.gitignore
+++ b/.gitignore
@@ -2,4 +2,5 @@ build
 .cache
 subprojects/*
 !subprojects/catch2.wrap
+bin/test
 
diff --git a/bin/main.cpp b/bin/main.cpp
index a82cef6..ac50ea6 100644
--- a/bin/main.cpp
+++ b/bin/main.cpp
@@ -1,6 +1,10 @@
 #include <vector>
 #include <forward_list>
 
+#include "hack/audio/generate.hpp"
+#include "hack/audio/play.hpp"
+#include "hack/audio/save.hpp"
+
 #include "hack/logger/logger.hpp"
 
 #include "hack/range/sort.hpp"
@@ -14,6 +18,28 @@
 
 auto main(int argc, char *argv[]) -> int
 { 
+  {
+    int sample_rate = 44100;
+    //  Воспроизведение последовательности нот
+    hack::warn()("Пример использования: audio");
+
+    std::vector<double> frequencies = { 130.81, 138.59, 146.83, 155.56, 164.81, 174.61, 185.00, 196.00, 207.65, 220.00, 233.08, 246.94 };
+    std::vector<double> melody;
+    for (double freq : frequencies) 
+    {
+      auto note = hack::audio::generate::sine(freq, 0.3, sample_rate);
+      melody.insert(melody.end(), note.begin(), note.end());
+      // Добавляем небольшую паузу между нотами. Т.е. вставляем кол-во с нулевым значением.
+      melody.insert(melody.end(), sample_rate * 0.05, 0.0);
+    }
+    
+    hack::log()("Воспроизведение последовательности нот...");
+    hack::audio::play(melody, sample_rate);
+
+    hack::log()("Запись последовательности нот в файл");
+    hack::audio::save("/mnt/raid/projects/hack/hack/bin/test/note.wav", melody, sample_rate);
+  }
+
   // patterns::ring_buffer
   {
     hack::patterns::ring_buffer<int> rb;
@@ -55,8 +81,8 @@ auto main(int argc, char *argv[]) -> int
     hack::log()(v);
     hack::log()(l);
 
-    // hack::range::save_to_file("/mnt/raid/projects/hack/hack/test.txt", v);
-    // hack::range::save_to_file("/mnt/raid/projects/hack/hack/test.txt", v, ":");
+    hack::range::save_to_file("/mnt/raid/projects/hack/hack/bin/test/range.txt", v);
+    hack::range::save_to_file("/mnt/raid/projects/hack/hack/bin/test/range.delemiter.txt", v, ":");
   }
 
   // math::max
diff --git a/meson.build b/meson.build
index 99a70d0..38d3c5f 100755
--- a/meson.build
+++ b/meson.build
@@ -31,6 +31,7 @@ args = []
 inc = []
 deps = [
   dependency('uuid'),
+  dependency('sndfile'),
   dependency('portaudio-2.0', required: true)
 ]
 
diff --git a/src/hack/audio/generate.hpp b/src/hack/audio/generate.hpp
new file mode 100644
index 0000000..6a65f84
--- /dev/null
+++ b/src/hack/audio/generate.hpp
@@ -0,0 +1,56 @@
+#pragma once
+
+#include <vector>
+#include <math.h>
+
+// Генерация разнообразных звуковых волн
+namespace hack::audio::generate
+{
+  // Генерация синусоидального сигнала
+  inline std::vector<double> sine(double frequency, double duration, int sample_rate) 
+  {
+    std::vector<double> samples;
+    int total_samples = static_cast<int>(duration * sample_rate);
+    
+    for (int i = 0; i < total_samples; ++i) 
+    {
+      double time = static_cast<double>(i) / sample_rate;
+      double sample = 0.5 * std::sin(2.0 * M_PI * frequency * time);
+      samples.push_back(sample);
+    }
+    
+    return samples;
+  }
+
+  // Генерация прямоугольного сигнала
+  inline std::vector<double> square_wave(double frequency, double duration, int sample_rate) 
+  {
+    std::vector<double> samples;
+    int total_samples = static_cast<int>(duration * sample_rate);
+    int samples_per_period = sample_rate / frequency;
+    
+    for (int i = 0; i < total_samples; ++i) 
+    {
+      double sample = ((i / samples_per_period) % 2 == 0) ? 0.5 : -0.5;
+      samples.push_back(sample);
+    }
+    
+    return samples;
+  }
+
+  // Генерация белого шума
+  inline std::vector<double> white_noise(double duration, int sample_rate) 
+  {
+    std::vector<double> samples;
+    int total_samples = static_cast<int>(duration * sample_rate);
+    
+    for (int i = 0; i < total_samples; ++i) 
+    {
+      double sample = (static_cast<double>(rand()) / RAND_MAX) * 2.0 - 1.0;
+      samples.push_back(sample * 0.3);  // Уменьшаем громкость
+    }
+    
+    return samples;
+  }
+}
+
diff --git a/src/hack/audio/play.hpp b/src/hack/audio/play.hpp
index 201e43c..fe9a59b 100644
--- a/src/hack/audio/play.hpp
+++ b/src/hack/audio/play.hpp
@@ -1,13 +1,13 @@
 #pragma once
 
 #include <vector>
-#include "hack/logger/logger.hpp"
 #include <portaudio.h>
+#include "hack/logger/logger.hpp"
 
 namespace hack::audio
 {
-  // namespace 
-  // {
+  namespace 
+  {
     const int FRAMES_PER_BUFFER = 256;
 
     // callback - вызывается, когда нужны новые аудио-данные
@@ -26,7 +26,7 @@ namespace hack::audio
 
       return (pos >= samples.size()) ? paComplete : paContinue;
     } 
-  // }
+  }
 
   // пока только wav
   inline void play(std::vector<double>& samples, int sample_rate) 
diff --git a/src/hack/audio/save.hpp b/src/hack/audio/save.hpp
index c64cc13..a79bac1 100644
--- a/src/hack/audio/save.hpp
+++ b/src/hack/audio/save.hpp
@@ -34,5 +34,3 @@ namespace hack::audio
     sf_close(outfile);
   }
 }
-
-
diff --git a/src/hack/range/save_to_file.hpp b/src/hack/range/save_to_file.hpp
index 85c9ac1..bc4c882 100644
--- a/src/hack/range/save_to_file.hpp
+++ b/src/hack/range/save_to_file.hpp
@@ -5,12 +5,15 @@
 #include <iostream>
 #include "hack/logger/logger.hpp"
 
+// Записывает массив в файл с указанным разделителем
 namespace hack::range
 {
   namespace {
     template<typename T>
     void save_to_file_impl(const std::filesystem::path& p, T& v, std::string delemiter = ", ")
     {
+      // Создаем директорию, если ее нет.
+      std::filesystem::create_directories(p.parent_path());
       std::ofstream file(p);
       if (!file) 
       {
diff --git a/src/meson.build b/src/meson.build
index 18165fa..be61d77 100755
--- a/src/meson.build
+++ b/src/meson.build
@@ -1,6 +1,11 @@
 inc += include_directories('.')
 
 headers = [
+  'hack/audio/generate.hpp',
+  'hack/audio/play.hpp',
+  'hack/audio/save.hpp',
+
+
   'hack/concepts/concepts.hpp',
 
   'hack/iterators/associative_ostream_iterator.hpp',
@@ -18,12 +23,10 @@ headers = [
   'hack/utils/color.hpp'
 ]
 
-sources = []
-
 lib = library(
   meson.project_name(), 
   include_directories : inc,
-  sources: [headers, sources],
+  sources: [headers],
   dependencies : deps,
   cpp_args: args
 )
diff --git a/test.txt b/test.txt
deleted file mode 100644
index f7fa9aa..0000000
--- a/test.txt
+++ /dev/null
@@ -1 +0,0 @@
-1, 2, 3, 4, 4, 4, 6
\ No newline at end of file