[y, Fs] = audioread( 'auda_say1-10_44khz.wav');
myfir = [1 zeros(1,.05*Fs) 0.8 zeros(1,.1*Fs) 0.6 zeros(1,.15*Fs) 0.4 zeros(1,.2*Fs) 0.2];
myout = conv(myfir, y);
sound(myout, Fs);