What would I add to the following code to detect the pitch ofthe audio signal? (use cepstral method)
clear all;
close all;
clc;
info = audiodevinfo;
info.input(1)
info.input(2)
pause(3); % delete it if necessary
clc;
fs = 44.1e3;
noBits = 16;
noChannels = 1;
recordObject = audiorecorder(fs,noBits,noChannels);
disp('Start speaking...');
record(recordObject);
pause(3);
stop(recordObject);
disp('End of Recording.');
x = getaudiodata(recordObject); %takin in as aperiodicsignal
noSamples = length(x); %length of vector x \"max(size(x))
time = [1:noSamples]/fs; %time ticks
%DFT: X[k]= (sigma x[n]*exp(-j*2*pi*k/Nf*n)
noSamples = length(x2)
noFrequencies = noSamples;
for ct =1:noSamples
X = nan(size(x2));
for k = 1:noFrequencies
X(k) = sum(x2.*exp(-j*2*pi*k/noFrequencies*n));
end
figure;
subplot(2,1,1);
kAsFrequencyIndicies = 1:noFrequencies;
plot(kAsFrequencyIndicies,abs(X));
box off;
subplot(2,1,2);
frequencyTicks = kAsFrequencyIndicies/noFrequencies*fs;
plot(frequencyTicks,abs(X));
box off;
