public static Format_Code fromInt( int val ){
            switch ( val ) {
                case 0x0001 : return WAVE_FORMAT_PCM;
                case 0x0003 : return WAVE_FORMAT_IEEE_FLOAT;
                case 0x0006 : return WAVE_FORMAT_ALAW;
                case 0x0007 : return WAVE_FORMAT_MULAW;
                case 0xFFFE : return WAVE_FORMAT_EXTENSIBLE;
            }
            return null;
        }