Processing wav generator

wav.pde

final int SIZE = 44100;
final int RATE = 44100;
byte[] file = new byte[ 44+SIZE*4 ];

float wave( float _time, float _right ){
  return sin( _time * PI * 2.0 * 440.0 );
}

void setup(){
  // "RIFF"
  file[ 0 ] = 'R';
  file[ 1 ] = 'I';
  file[ 2 ] = 'F';
  file[ 3 ] = 'F';
  
  // filesize - 8
  file[ 4 ] = byte( 36+SIZE*4 );
  file[ 5 ] = byte( ( 36+SIZE*4 ) >>> 8 );
  file[ 6 ] = byte( ( 36+SIZE*4 ) >>> 16 );
  file[ 7 ] = byte( ( 36+SIZE*4 ) >>> 24 );
  
  // "WAVE"
  file[ 8 ] = 'W';
  file[ 9 ] = 'A';
  file[ 10 ] = 'V';
  file[ 11 ] = 'E';
  
  // "fmt "
  file[ 12 ] = 'f';
  file[ 13 ] = 'm';
  file[ 14 ] = 't';
  file[ 15 ] = ' ';
  
  // chunk bytes
  file[ 16 ] = 16;
  file[ 17 ] = 0;
  file[ 18 ] = 0;
  file[ 19 ] = 0;
  
  // format ID
  file[ 20 ] = 1;
  file[ 21 ] = 0;
  
  // channel
  file[ 22 ] = 2;
  file[ 23 ] = 0;
  
  // sampling rate
  file[ 24 ] = byte( RATE );
  file[ 25 ] = byte( RATE >>> 8 );
  file[ 26 ] = byte( RATE >>> 16 );
  file[ 27 ] = byte( RATE >>> 24 );

  // byte / sec
  file[ 28 ] = byte( ( RATE*4 ) );
  file[ 29 ] = byte( ( RATE*4 ) >>> 8 );
  file[ 30 ] = byte( ( RATE*4 ) >>> 16 );
  file[ 31 ] = byte( ( RATE*4 ) >>> 24 );

  // block size
  file[ 32 ] = 4;
  file[ 33 ] = 0;

  // bit / sample
  file[ 34 ] = 16;
  file[ 35 ] = 0;
  
  // "data"
  file[ 36 ] = 'd';
  file[ 37 ] = 'a';
  file[ 38 ] = 't';
  file[ 39 ] = 'a';
  
  // SIZE
  file[ 40 ] = byte( SIZE*4 );
  file[ 41 ] = byte( SIZE*4 >>> 8 );
  file[ 42 ] = byte( SIZE*4 >>> 16 );
  file[ 43 ] = byte( SIZE*4 >>> 24 );
  
  for( int t=0; t<SIZE; t++ ){
    int l = int( min( max( wave( t / 44100.0, 0.0 ), -1.0 ), 1.0 ) * 32768.0 );
    file[ 44+t*4 ] = byte( l );
    file[ 44+t*4+1 ] = byte( l >>> 8 );
    int r = int( min( max( wave( t / 44100.0, 1.0 ), -1.0 ), 1.0 ) * 32768.0 );
    file[ 44+t*4+2 ] = byte( r );
    file[ 44+t*4+3 ] = byte( r >>> 8 );
  }
  
  saveBytes( "out.wav", file );
}