How can I apply a designed Low pass filter on an audio file ?
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');
John Williams answered .
2025-11-20
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);