// analysis
adc => FFT fft =^ IFFT ifft => dac;

// set fft size
1024 => fft.size;
// set hop size
512 => int hopSize;

// go
while( true )
{
    // compute ifft (should cascade up the upchuck chain)
    ifft.upchuck();
    // hop
    hopSize::samp => now;
}