 
 
 // iterates through al files in an album directory and calls playTrack for each track number iteratively
-static char playAlbum(byte numberOfFiles) {
+static char playAlbum(char numberOfFiles) {
   boolean loopWarningMessageFileNotFound = true;// make sure   file not found               warning message is shown at least once
   
   #ifdef DEBUG


// battery control
#ifdef LOWBAT
  const byte lowBatPin      = A2;      // pulled high to BAT but when the charger detects a low voltage (under 3.2V) the pin will drop down to 0V (LOW)
  boolean lowBatWarn        = true;    // we use this bool so we may only tell the user every 5 Minite sthat the Battery is low
#endif



      }
    } else {  // we may start playing as it seems
      // now let's get the number of files in the album directory
      const char numberOfFiles = countFiles(SD.open(plrCurrentFolder));
      
      // there is no file in the folder indicate this as a minor error
      if (numberOfFiles < 1) {
