Question

We must write a matlab code that will record a sound such as a piano key we will then perform a fft and determine the frequency of that sound. This should work for any sound we record it will be able to determine the frequency of the sound within a reasonable number.

CODE thus far:

close all; clear all; clc;

Fs = 8000;

recObj = audiorecorder(Fs,8,1);
disp('Start speaking:');
keyboard;
recordblocking(recObj, 5);
disp('End of Recording');

myRecording = getaudiodata(recObj);
figure, plot(myRecording), title('original time-domain voice recording');

keyboard;

pdFFT = fft(myRecording);
figure, plot(abs(pdFFT)), title('abs of fft');

Answer 1

Code:

close all; clear all; clc;

Fs = 8000; // Sampling Frequncy

recObj = audiorecorder(Fs,8,1); // Starting Audio Recording

disp('Start speaking:');

keyboard; // Pause for Some Recording

recordblocking(recObj, 5); // End of Reconding

disp('End of Recording');

myRecording = getaudiodata(recObj); // Getting Audio Data from Object

figure, plot(myRecording), // Display Time domain Graph

title('original time-domain voice recording');

keyboard; // Pause

pdFFT = fft(myRecording); // Frequncy Domain Conversion

figure, plot(abs(pdFFT)), title('abs of fft'); // Frequncy Domain Plot of Reconding

Output: