MemoryStream mStream = new MemoryStream();
            //stream.Read(
            byte[] tampon = new byte[512];
            int nBytesRead = 0;

            while ((nBytesRead = stream.Read(tampon, 0, 512)) > 0)
            {
                mStream.Write(tampon, 0, 512);
            }

            IntPtr ptr;
            byte[] dataB = mStream.ToArray();
            
            //Marshal.wCopy(dataB,0,ptr, dataB.Length);
            unsafe
            {

                byte[] b = new byte[255];

                fixed (byte* p =b) // context unsafe.
                {
                    ptr = (IntPtr)p;
                }
            }

            // Load wav.
            //data = Alut.alutLoadMemoryFromFile(fileName, out format, out size, out frequency);
            data = Alut.alutLoadMemoryFromFileImage(ptr,dataB.Length, out format, out size, out frequency);