analog read takes input 21 times per second on Matlab instead of 10,000 times a second as mentioned on website. Following is the code:

clear, clc

a = arduino(‘COM6’,‘due’);

Fs=88000; % SAMPLING FREQUENCY = (2.2 X Fmax) X 2mics =88kHz

tic;

i=0;

while toc<2 %% 2 sec sample

i=i+1;

v1(i)= readVoltage(a, 0);

v2(i)= readVoltage(a, 7);

end

##
t1 = (0:length(v1)-1)/Fs;

t2 = (0:length(v2)-1)/Fs;

%----- Signal plot --------%

figure(1);

subplot(2,1,1)

plot(t1,v1,‘r’)

title(‘Left Mic’)

xlabel(‘Time (s)’)

subplot(2,1,2)

plot(t2,v2,‘r’)

title(‘Right Mic’)

xlabel(‘Time (s)’)

when entered >>i

i=42 i.e 41/2 = 21 times per second