diff --git a/Ona_mowi_POL_07998.mid b/Ona_mowi_POL_07998.mid
new file mode 100644
index 0000000..ae32849
Binary files /dev/null and b/Ona_mowi_POL_07998.mid differ
diff --git a/main.cpp b/main.cpp
index 3f281cf..c79c548 100644
--- a/main.cpp
+++ b/main.cpp
@@ -3,6 +3,8 @@
 #include <iostream>
 #include <fstream>
 #include <cstring>
+#include <iomanip>
+#include <chrono>
 
 void WriteWAVHeader(std::ofstream &file, DWORD length) {
     DWORD dataChunkSize = length;
@@ -34,7 +36,13 @@ void WriteWAVHeader(std::ofstream &file, DWORD length) {
     file.write(reinterpret_cast<const char*>(&dataChunkSize), 4);
 }
 
-int main() {
+int main(int argc, char** argv) {
+    std::cout << "Program start\n";
+    if (argc != 2) {
+        std::cerr << "Wrong arguments!\n";
+        return -1;
+    }
+    
     // 1) Initialize BASS: default device, 44100 Hz, no flags
     if (!BASS_Init(-1, 44100, 0, NULL, NULL)) {
         std::cerr << "BASS_Init error: " << BASS_ErrorGetCode() << std::endl;
@@ -50,7 +58,7 @@ int main() {
     }
 
     // Create decoding stream (no playback)
-    HSTREAM midiStream = BASS_MIDI_StreamCreateFile(FALSE, "Rapapara_POL_07753.mid", 0, 0,
+    HSTREAM midiStream = BASS_MIDI_StreamCreateFile(FALSE, argv[1], 0, 0,
         BASS_STREAM_DECODE | BASS_SAMPLE_FLOAT, 44100);
     if (!midiStream) {
         std::cerr << "BASS_MIDI_StreamCreateFile error: " << BASS_ErrorGetCode() << std::endl;
@@ -81,11 +89,16 @@ int main() {
     const int bufferSize = 44100 * 2 * sizeof(float); // 1 second float stereo
     float buffer[44100 * 2];
 
+    std::cout << "Synthesis start\n";
+    
+    QWORD totalRead = 0;
+    QWORD totalStreamLength = BASS_ChannelGetLength(midiStream, BASS_POS_BYTE);
+    auto lastUpdate = std::chrono::steady_clock::now();
+    
     while (true) {
         int bytes = BASS_ChannelGetData(midiStream, buffer, bufferSize);
         if (bytes <= 0) break;
 
-        // Convert float samples to 16-bit PCM
         short pcm[44100 * 2];
         for (int i = 0; i < bytes / 4; ++i) {
             float sample = buffer[i] * 32767.0f;
@@ -94,14 +107,18 @@ int main() {
             pcm[i] = static_cast<short>(sample);
         }
 
-        wav.write(reinterpret_cast<const char*>(pcm), bytes / 2); // float->16bit halves size
-        totalBytes += bytes / 2;
+        wav.write(reinterpret_cast<const char*>(pcm), bytes / 2);
+        totalRead += bytes;
+
+        float percent = (totalStreamLength > 0) ? (100.0f * totalRead / totalStreamLength) : 0.0f;
+        printf("\rProgress: %.2f%%", percent);
     }
 
     wav.seekp(0);
     WriteWAVHeader(wav, totalBytes);
     wav.close();
 
+    std::cout << "\nSynthesis end\n";
     std::cout << "Exported to output.wav" << std::endl;
 
     // 6) Clean up