how to add 2 or more different length signals?
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I want to add 2 or more signals to play them at the same time, like a sampler. If i know well i need to convert them to the same sampling rate. How can i do that if i have a big sample library? If sample A is longer than sample B, after B finishes playing, the rest from A should continue playing till end. So it's only need a simple addition from the beginning of each other until the longest sample finishes?
Thx in advance
I tried with this source code:
clear;
clc;
myFolder = 'C:\Users\Aron\Samples\proba';
if exist(myFolder, 'dir') ~= 7
Message = sprintf('Error: The following folder does not exist:\n%s', myFolder);
uiwait(warndlg(Message));
return;
end
filePattern = fullfile(myFolder, '*.wav');
wavFiles = dir(filePattern);
sampleArray = cell(length(wavFiles),1);
Fs = zeros(size(sampleArray));
for k = 1:length(wavFiles)
baseFileName = wavFiles(k).name;
fullFileName = fullfile(myFolder, baseFileName);
fprintf(1, 'Now reading %s\n', fullFileName);
[sampleArray{k}, Fs(k)] = wavread(fullFileName);
end
s=1;
data_1=(sampleArray{s});
%sound(data_1);
%%
L = length(data_1);
NFFT = 2^nextpow2(L); % Next power of 2 from length of y
Y = fft(data_1,NFFT)/L;
f = Fs/2*linspace(0,1,NFFT/2+1);
% Plot single-sided amplitude spectrum.
figure(1);
plot(f,2*abs(Y(1:NFFT/2+1)))
title('Single-Sided Amplitude Spectrum of y(t)')
xlabel('Frequency (Hz)')
ylabel('|Y(f)|')
%%
g=9;
data_2=(sampleArray{g});
L = length(data_2);
NFFT = 2^nextpow2(L); % Next power of 2 from length of y
X = fft(data_2,NFFT)/L;
f = Fs/2*linspace(0,1,NFFT/2+1);
data_sum=Y+X;
data_sum_in_time = ifft(data_sum,NFFT)*L;
sound (data_sum_in_time);
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