Original music film

Matlab film

Code

Original Music

fs=44100;

[y, fs]=audioread('April.mp3');

sound(y, fs);

time=(1:length(y))/fs;

plot(time, y);

xlabel('Time');

ylabel('Magnitude');

title('Wave');

Double Speed

fs=44100;

[y, fs]=audioread('April.mp3');

sound(y, 2*fs);

time=(1:length(y))/fs;

plot(time, y);

xlabel('Time');

ylabel('Magnitude');

title('Wave');

Fourier transform

fs=44100;

[y, fs]=audioread('April.mp3');

s = fft(y);

f = abs(s);

plot(f);

xlabel('Frequency');

ylabel('Magnitude');

title('Fourier wave');

sound(y,fs);

Inverse fourier transform

fs=44100;

[y, fs]=audioread('April.mp3');

s = fft(y);

f = abs(s);

y2 = ifft(s);

f2 = abs(fft(y2));

subplot(2,2,1), plot(f);

subplot(2,2,2), plot(y);

subplot(2,2,3), plot(f2);

subplot(2,2,4), plot(y2);

sound(y2,fs);