diff --git a/bin/main.cpp b/bin/main.cpp
index aa1b2ac..a953135 100644
--- a/bin/main.cpp
+++ b/bin/main.cpp
@@ -4,6 +4,7 @@
 #include "hack/logger/logger.hpp"
 
 #include "hack/range/sort.hpp"
+#include "hack/range/save_to_file.hpp"
 #include "hack/math/max.hpp"
 
 #include "hack/patterns/ring_buffer.hpp"
@@ -53,6 +54,8 @@ 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);
   }
 
   // math::max
diff --git a/src/hack/audio/save.hpp b/src/hack/audio/save.hpp
index 4ee05c7..c64cc13 100644
--- a/src/hack/audio/save.hpp
+++ b/src/hack/audio/save.hpp
@@ -8,7 +8,7 @@
 namespace hack::audio
 {
   // пока только wav
-  inline void save(const std::string& path, const std::vector<float>& samples, int sample_rate) 
+  inline void save(const std::string& path, const std::vector<double>& samples, int sample_rate) 
   {
     SF_INFO sf_info;
     sf_info.samplerate = sample_rate;
@@ -30,7 +30,7 @@ namespace hack::audio
       return;
     }
 
-    sf_write_float(outfile, samples.data(), samples.size());
+    sf_write_double(outfile, samples.data(), samples.size());
     sf_close(outfile);
   }
 }
diff --git a/src/hack/range/save_to_file.hpp b/src/hack/range/save_to_file.hpp
new file mode 100644
index 0000000..85c9ac1
--- /dev/null
+++ b/src/hack/range/save_to_file.hpp
@@ -0,0 +1,40 @@
+#pragma once
+
+#include <filesystem>
+#include <fstream>
+#include <iostream>
+#include "hack/logger/logger.hpp"
+
+namespace hack::range
+{
+  namespace {
+    template<typename T>
+    void save_to_file_impl(const std::filesystem::path& p, T& v, std::string delemiter = ", ")
+    {
+      std::ofstream file(p);
+      if (!file) 
+      {
+        error()("cant open file", p);
+        return;
+      }
+      
+      for (std::size_t i = 0; i < v.size(); ++i)
+      {
+        if (i == v.size() - 1) delemiter = "";
+        file << v[i] << delemiter;
+      }
+      file.close();
+      if (file.fail()) 
+        error()("file dont save", p);
+    }
+  }
+
+  template<typename T>
+  void save_to_file(const std::filesystem::path& p, T& v, std::string delemiter = ", ")
+  {
+    save_to_file_impl(p, v, delemiter);
+  }
+}
+
+
+
diff --git a/src/meson.build b/src/meson.build
index 0f847e5..18165fa 100755
--- a/src/meson.build
+++ b/src/meson.build
@@ -11,6 +11,7 @@ headers = [
   'hack/math/max.hpp',
 
   'hack/range/sort.hpp',
+  'hack/range/save_to_file.hpp',
 
   'hack/patterns/ring_buffer.hpp',
   
diff --git a/test.txt b/test.txt
new file mode 100644
index 0000000..f7fa9aa
--- /dev/null
+++ b/test.txt
@@ -0,0 +1 @@
+1, 2, 3, 4, 4, 4, 6
\ No newline at end of file