Problem removing the noise of a song

Hello everybody I've trying to remove the noise of a song. Fisrt I use FFT to know in which frequency I have to desing my filter. I designed a notch filter to remove the noise but I can't remove it. I read that most of the time this type of noise is at 60 Hz but also didn't work. Here is the song I've trying filtering and also here is the code:

[x,fs] = audioread('/Users/luismiguells/Desktop/Sample.m4a'); 

T1 = 0;
T2 = 8;
Ts = 1/fs;
N = (T2-T1)/Ts;
L = x(1:N);
n = 0:N-1;
t = n*Ts;
f = n/length(n)*fs;
Lomega = fft(L);
cc = round((N+log2(N))/2.0);
figure(1), plot(abs(fft(x)));
figure(2), plot(f, abs(Lomega));

Y4_out = conv(L, SBF(n-cc), 'same');

figure(3), plot(f, abs(fft(SBF(n-cc))));
figure(4), plot(t, Y4_out);
sound(Y4_out, fs);
figure(5), plot(f, abs(fft(Y4_out))/N);


function Y4 = SBF(n)
    fc1 = 4.10e+4;
    fc2 = 4.20e+4;
    Y4 = 2*fc1*sinc(2*pi*fc1*n)-2*fc2*sinc(2*pi*fc2*n);
    index = n == 0;
    Y4(index) = 20;
end