adc => Gain g => FFT fftx => blackhole;

//FFT for sound buffer
FFT ffty => blackhole;

// ifft transforms back into audio
IFFT ifft => dac;

2048 => fftx.size => ffty.size => int FFT_SIZE;
FFT_SIZE / 8 => int HOP_SIZE;
Windowing.hann(512) => fftx.window;
Windowing.hann(512) => ffty.window;


//source is "robot" saw waves
BlitSaw b => ffty;

0 => b.harmonics;
1 => b.gain;

//starting frequencies, in MIDI #s
330 => b.freq;

// use this to hold contents of spectral computation
complex Z[FFT_SIZE/2];

// control loop
while( true )
{
    // take fft
    fftx.upchuck() @=> UAnaBlob X; //spectrum from adc
    ffty.upchuck() @=> UAnaBlob Y; //spectrum from buffer
    
    // bin by bin:
    for( int i; i < FFT_SIZE/2; i++ ) {
		(X.cval(i)$polar).mag => float m;
		if (m > .0001) {
			//Magnitude of bin is pretty small, so take the square root
			Math.pow((X.cval(i)$polar).mag, .5) * Y.cval(i) => Z[i];
	}
		else
			0 * Y.cval(i) => Z[i];
	} 

    // take ifft
    ifft.transform( Z );
    
    // advance time
    HOP_SIZE::samp => now;
}