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How can I apply a designed Low pass filter on an audio file ?

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Han
Han on 9 May 2018
Answered: Ameer Hamza on 9 May 2018
i have a designed Low pass filter
i want to apply this low pass filter on an audio file
How can i do ?
i only know that i can use [y,Fs] = audioread('XXX.wav');

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Accepted Answer

Ameer Hamza
Ameer Hamza on 9 May 2018
You can use Control system approach to filter this signal as follow
[data, fs] = audioread('sample.wav');
T = 1/fs;
t = (0:size(data,1)-1)'*T; % get time of samples;
filter = tf(18181818, [1 9090.9090909090 18181818.181818]);
channel1_filtered = lsim(filter, data(:,1), t);
channel2_filtered = lsim(filter, data(:,2), t);

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