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Merge pull request #51 from ltcptgeneral/AnuragFilters

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Anurag filters
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TurtleEmperorx 2021-12-10 18:14:45 -08:00 committed by GitHub
commit a4df2fdddb
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2 changed files with 15 additions and 56 deletions
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29
src/NotWorking/AnuragDampenTarget.m
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@ -10,41 +10,20 @@ function output_x = AnuragDampenTarget(x, Fs,LOW, MID, HIGH)
% Detailed explanation goes here
TARGET = MID;
AreaPercentage = 0.15;
[dim,len] = size(x); %get length of the input
len = length(x); %get length of the input
F = Fs * ((-len/2) : ((len/2) - 1)) / len;
lenf = length(F);
Mod_Freq = ifft(fft(x)); %Fourier Transform of the input signal
Mod_Freq = fftshift(fft(x)); %Fourier Transform of the input signal
output = zeros([1,lenf]); % zero array of size Mod_freq
if(dim == 2) %check for dual channel audio
F = [F;F];
output = [output;output];
end
%set the bounds
lowerBound = (1-AreaPercentage) * TARGET;
upperBound = (1+AreaPercentage) * TARGET;
%% Dampen the target frequencies and maintain the others
if(dim == 2) %iterate through both channels if track is dual channel
for n = 1:lenf
if ((lowerBound < abs(F(1,n))) && abs(F(1,n)) < upperBound)
output(1,n) = 1;
else
output(1,n) = 0.5;
end
end
for n = 1:lenf
if ((lowerBound < abs(F(2,n))) && abs(F(2,n)) < upperBound)
output(2,n) = 1;
else
output(2,n) = .5;
end
end
else %iterate onnly once for monochannel
for n = 1:lenf
if ((lowerBound < abs(F(n))) && abs(F(n)) < upperBound)
output(n) = 1;
output(n) = 0.5;
else
output(n) = .5;
end
output(n) = 1;
end
end
%%Filter the original signal and transform

26
src/NotWorking/AnuragEnhanceTarget.m
View File

@ -10,35 +10,16 @@ function output_x = AnuragEnchanceTarget(x, Fs,LOW, MID, HIGH)
% Detailed explanation goes here
TARGET = MID;
AreaPercentage = 0.15;
[dim,len] = size(x); %get length of the input
len = length(x); %get length of the input
F = Fs * ((-len/2) : ((len/2) - 1)) / len;
lenf = length(F);
Mod_Freq = ifft(fft(x)); %Fourier Transform of the input signal
Mod_Freq = fftshift(fft(x)); %Fourier Transform of the input signal
output = zeros([1,lenf]); % zero array of size Mod_freq
if(dim == 2) %check for dual channel audio
F = [F;F];
output = [output;output];
end
%set the bounds
lowerBound = (1-AreaPercentage) * TARGET;
upperBound = (1+AreaPercentage) * TARGET;
%% Amplify the target frequencies and dampen the others
if(dim == 2) %iterate through both channels if track is dual channel
for n = 1:lenf
if ((lowerBound < abs(F(1,n))) && abs(F(1,n)) < upperBound)
output(1,n) = 2;
else
output(1,n) = 0.75;
end
end
for n = 1:lenf
if ((lowerBound < abs(F(2,n))) && abs(F(2,n)) < upperBound)
output(2,n) = 2;
else
output(2,n) = 0.75;
end
end
else %iterate onnly once for monochannel
for n = 1:lenf
if ((lowerBound < abs(F(n))) && abs(F(n)) < upperBound)
output(n) = 2;
@ -46,7 +27,6 @@ function output_x = AnuragEnchanceTarget(x, Fs,LOW, MID, HIGH)
output(n) = 0.75;
end
end
end
%%Filter the original signal and transform
filtered_Mod_Freq = fftshift(Mod_Freq .* output);
output_x = real(ifft(filtered_Mod_Freq));