Audio signal processing/audioread/fft

Question

0 个投票

THIS IS NOT FOR HOMEWORK OR GRADING

"Create a software tool for audio signal modulation. The signal read from the audio file should be modulated by the sine wave of the specified frequency. The software interface must allow the user to select the audio file and the sine wave frequency. The program should provide time and spectrum diagrams of the initial and modulated signals as a result of the work performed. The user should be able to listen to both signals."

My question is how to get frequency graph/domain from [y,Fs] = audioread(file)

[file,path] = uigetfile('*.*');
if isequal(file,0)
   disp('User selected Cancel');
else
   disp(['User selected ', fullfile(path,file)]);
end
[y,Fs] = audioread(file);
% time domain
t=([0:length(y)-1])/Fs;
subplot(211);
plot(t,y)
title('Graph of audio signal')
grid on 
xlabel('Time')
ylabel('Amplitude')