Matlab - Matlab, suma de señales

f=[800 900];

fs=44100;

A=[0.1 0.2];

duracion=1;

function x = sintesis (N,A,f,d)

t=[0:1/fs:duracion];

x=[A.*sin(2.*pi.*f.*t)];

sound(x,fs);

sub_t=(1:100);

sub_x=x(1:100);

stem(sub_t,sub_x);

audiowrite('Sonido.wav',x,fs);

end

>> sonido_sintesis

  Name      Size                Bytes  Class     Attributes

  A         1x2                    16  double

  f         1x2                    16  double

  t         1x44101            352808  double

Matrix dimensions must agree.

Error in sonido_sintesis (line 10)

x=A.*sin(2*pi*f.*t);