public byte[] ReadWave() {
            fs = GetFileStream();
            br = new BinaryReader(fs);

            // making new empty byteArray to write the audio file in
            byteArray = new byte[fs.Length];

            // filling the byteArray
            br.Read(byteArray, 0, byteArray.Length);

            // close the streams
            br.Close();
            fs.Close();

            return byteArray;
        }