diff --git a/src/lib_ccaligner/read_wav_file.cpp b/src/lib_ccaligner/read_wav_file.cpp
index 9a33128..01b05a1 100644
--- a/src/lib_ccaligner/read_wav_file.cpp
+++ b/src/lib_ccaligner/read_wav_file.cpp
@@ -12,7 +12,7 @@ WaveFileData::WaveFileData(std::string fileName)
     _samples.resize(0);
 }
 
-bool WaveFileData::checkValidWave (std::vector<char>& fileData)
+bool WaveFileData::checkValidWave (std::vector<unsigned char>& fileData)
 {
     /*Offset  Size  Name             Description
      * 0         4   ChunkID          Contains the letters "RIFF" in ASCII form
@@ -44,8 +44,8 @@ bool WaveFileData::openFile ()
      */
 
     std::noskipws(infile);
-    std::istream_iterator<char> begin (infile), end;
-    std::vector<char> fileData (begin, end);
+    std::istream_iterator<unsigned char> begin (infile), end;
+    std::vector<unsigned char> fileData (begin, end);
 
     if(checkValidWave(fileData))
     {
@@ -210,8 +210,6 @@ bool WaveFileData::parse()
         }
     }
 
-    std::cout<<subChunk1ID<<" "<<subChunk2ID<<" "<<sampleRate<<" "<<bitRate<<std::endl;
-
     return true;
 }
 
@@ -219,12 +217,12 @@ bool WaveFileData::parse()
  * https://stackoverflow.com/a/2386134/6487831
  */
 
-unsigned long WaveFileData::fourBytesToInt (std::vector<char>& fileData, int index)
+unsigned long WaveFileData::fourBytesToInt (std::vector<unsigned char>& fileData, int index)
 {
     return ((fileData[index + 3] << 24) | (fileData[index + 2] << 16) | (fileData[index + 1] << 8) | fileData[index]);
 }
 
-int WaveFileData::twoBytesToInt (std::vector<char>& fileData, int index)
+int WaveFileData::twoBytesToInt (std::vector<unsigned char>& fileData, int index)
 {
     return ((fileData[index + 1] << 8) | fileData[index]);
 }
diff --git a/src/lib_ccaligner/read_wav_file.h b/src/lib_ccaligner/read_wav_file.h
index fa97528..071b8dd 100644
--- a/src/lib_ccaligner/read_wav_file.h
+++ b/src/lib_ccaligner/read_wav_file.h
@@ -16,14 +16,14 @@
 class WaveFileData
 {
     std::string _fileName;
-    std::vector<char> _fileData;
+    std::vector<unsigned char> _fileData;
     std::vector<std::vector<double>> _samples;
 
-    bool checkValidWave (std::vector<char>& fileData);
+    bool checkValidWave (std::vector<unsigned char>& fileData);
     bool parse();
 
-    unsigned long fourBytesToInt (std::vector<char>& fileData, int index);
-    int twoBytesToInt (std::vector<char>& fileData, int index);
+    unsigned long fourBytesToInt (std::vector<unsigned char>& fileData, int index);
+    int twoBytesToInt (std::vector<unsigned char>& fileData, int index);
     double twoBytesToDouble (int sample);
 
 public: