Audio Recording on Matlab Issue

Hi,

I am trying to record myself saying "hello" and "good evening" on my laptop but when I plot the signals, I am obtaining disrupted square signals instead of one consistent signal. Is there something wrong with my code?

clear all; 
close all;

recording = audiorecorder; 
disp('Initiate Recording')

recordblocking( recording, 2.0 ); 

disp('End') 

play(recording) 

recordingD = getaudiodata(recording); 

recording = audiorecorder; 
disp('Initiate Second Recording')

recordblocking( recording, 2.0 ); 

disp('End') 

play(recording) 

recordingD_1 = getaudiodata(recording); 

N = length(recordingD)
N_1 = length(recordingD_1)
fs = 8000;

figure(1)
t = (0:N-1) / fs; 
plot(t, recordingD)
title("Hello Recording")

figure(2)
plot(t, recordingD_1)
title("Good Evening Recording")

Answer 1

[Thiago Henrique Gomes Lobato]

Your code is fine, those square signals are just because the low amount of bits in the default audiorecorder which is very low (8). Just start your record object as follows and you will see a better result

recording = audiorecorder(8000,16,1); %(Fs,nBits,NumChannels)