Including Distortion with Audio Signal
33 views (last 30 days)
Show older comments
I am new to MATLAB and am attempting to distort an mp3 file. I found code for distortion but I don't know how to implement the function with my signal. How do i pass the signal into the distortion? Distortion code I am using is below but I'm open to change it if need be.
function [y] = fuzz(x, Fs)
% Distortion based on an exponential function
% x - input
% gain - amount of distortion,
% mix - mix of original and distorted sound
%1=only distorted
gain = 11;
mix = 0.1;
q=x./abs(x);
y=q.*(1-exp(gain*(q.*x)));
y=mix*y+(1-mix)*x;
end
0 Comments
Answers (1)
Mathieu NOE
on 29 Mar 2021
hello
this is an example how to use your function within a main code
but I guess the implementation for the distortion is not correct , the result was making my ears bleed...
had to reduce "gain" factor but even then I got only "scratches"
clearvars;
close all;
infile='DirectGuitar.wav';
outfile='out_dist.wav';
% read the sample waveform
[x,Fs] = audioread(infile);
% normalize x to +/- 1 amplitude
x = x ./ (max(abs(x)));
[y] = fuzz(x, Fs);
% write output
% normalize y to +/- 1 amplitude
y = y ./ (max(abs(y)));
audiowrite(outfile, y, Fs);
figure(1)
hold on
plot(x,'r');
plot(y,'b');
title('Distorded and original Signal');
sound(y,Fs);
function [y] = fuzz(x, Fs)
% Distortion based on an exponential function
% x - input
% gain - amount of distortion,
% mix - mix of original and distorted sound
%1=only distorted
gain = 11/5;
mix = 0.1;
q=x./abs(x);
y=q.*(1-exp(gain*(q.*x)));
y=mix*y+(1-mix)*x;
end
0 Comments
See Also
Categories
Find more on Audio Processing Algorithm Design in Help Center and File Exchange
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!