// really really bad cross synthesizer... // source one (mic)adc => FFT X => blackhole;// source two (to be connected below)FFT Y => blackhole;// synthesisIFFT ifft => dac; // what to crossBlitSquare blt[6];[ 40, 46, 52, 60, 64, 87] @=> int pitches[];for( int i; i < blt.size(); i++ ){    blt[i] => Y;    20 => blt[i].harmonics;    pitches[i] => Std.mtof => blt[i].freq;} // set FFT size1024 => X.size => Y.size => int FFT_SIZE;// desired hop sizeFFT_SIZE / 4 => int HOP_SIZE;// set window and window sizeWindowing.hann(512) => X.window;Windowing.hann(512) => Y.window;Windowing.hann(512) => ifft.window;// use this to hold contentscomplex Z[FFT_SIZE/2]; // control loopwhile( true ){    // take ffts    X.upchuck();    Y.upchuck();        // multiply in frequency domain    for( int i; i < X.size()/2; i++ )        Math.sqrt((Y.cval(i)$polar).mag) * X.cval(i) => Z[i];        // 2 * Y.cval(i) * X.cval(i) => Z[i];        // take ifft    ifft.transform( Z );        // advance time    HOP_SIZE::samp => now;}