How do i silence part of wav file ?

So i need to input star and and of a part of wav file i want to alter and then make that part silent.

>> song1 = wavread('C:\Program Files\MATLAB\AM.wav');
>> song1(44100:44100*10) = 0;

I tried this (silencing from 1 to 10 sec) but nothing happens.

Any ideas ?

Answer 1

[Image Analyst]

This works for me. It blanks out some seconds:

% song1 = wavread('C:\Program Files\MATLAB\R2014a\toolbox\signal\sigdemos\guitartune.wav');
song1 = wavread('C:\Program Files\MATLAB\R2014a\toolbox\signal\sigdemos\noisymusic.wav');
fprintf('song1 is %d elements long\n', length(song1));
subplot(2,1,1);
plot(song1);
song1(44100:44100*10) = 0;
subplot(2,1,2);
plot(song1);
% sound(song1);
msgbox('Done with demo!');