public static String rawToAsciiString(byte[] quality,int offset,int length){
  final StringBuilder b=new StringBuilder();
  final int end=offset + length;
  for (int i=offset; i < end; i++) {
    b.append(rawToAsciiQuality(quality[i]));
  }
  return b.toString();
}

public static String rawToAsciiString ( byte [ ] quality , int offset , int length ) { final StringBuilder b = new StringBuilder ( ) ; final int end = offset + length ; for ( int i = offset ; i < end ; i ++ ) { b . append ( rawToAsciiQuality ( quality [ i ] ) ) ; } return b . toString ( ) ; }
converts an array of bytes into a sanger - encoded quality string
