hello
the question is not 100 % clear to me
if you want to play the same signal to a different pitch , you can simply do
newfs = 1000;
sound(y,newfs);
but as the signal has not been resampled , the pitch will be different as if you had played it with the original sampling frequency fs
if you want to have the same pitch , you need also to resample / decimate the data
here is an example how to decimate the data (multi channel case here) , assuming the new sampling rate is a integer factor lower compared to the original sampling rate :
%% decimate (if needed)
% NB : decim = 1 will do nothing (output = input)
decim = 1;
if decim>1
for ck = 1:channels
newsignal(:,ck) = decimate(signal(:,ck),decim);
newfs = fs/decim;
end
end
