question: private static ByteBuffer generateWavHeader ( int sampleCount ) { final int numDataBytes = sampleCount * NUM_CHANNELS * BITS_PER_SAMPLE / 8 ; ByteBuffer buf = ByteBuffer . allocate ( 44 ) ; buf . order ( ByteOrder . LITTLE_ENDIAN ) ; buf . putInt ( 0x46464952 ) ; buf . putInt ( 36 + numDataBytes ) ; buf . putInt ( 0x45564157 ) ; buf . putInt ( 0x20746d66 ) ; buf . putInt ( 16 ) ; buf . putShort ( ( short ) 1 ) ; buf . putShort ( ( short ) NUM_CHANNELS ) ; buf . putInt ( SAMPLE_RATE ) ; buf . putInt ( SAMPLE_RATE * NUM_CHANNELS * BITS_PER_SAMPLE / 8 ) ; buf . putShort ( ( short ) ( NUM_CHANNELS * BITS_PER_SAMPLE / 8 ) ) ; buf . putShort ( ( short ) BITS_PER_SAMPLE ) ; buf . putInt ( 0x61746164 ) ; buf . putInt ( numDataBytes ) ; buf . position ( 0 ) ; return buf ; }
target:  Generates the 44-byte WAV file header.