%IIR priklad  optimalizovaný na zobrazenie polov
[y, Fs] = audioread( 'auda_say1-10_44khz.wav');
myiir = [1 zeros(1, round(0.001*44100)) 0.90];
myfir = [1];
subplot(2,1,1);
freqz(myfir,myiir);
subplot(2,1,2);
zplane (myfir, myiir);
myout = filter(myfir, myiir, y);
sound(myout, Fs);