({
  var formant, in, chain, out;
  formant = SoundIn.ar([0]);
  RecordBuf.ar(formant, 0, loop: 0);
  in = PlayBuf.ar(1, 0, loop:1);
  chain = FFT(LocalBuf(1024), in);
  chain = chain.pvcalc(
    1024, {|mags, phases|
	    [mags.reverse, phases.reverse];
    }
  );
  chain = PV_BinShift(chain);
  out = IFFT(chain);
  [out, out];
}.play(s);
)