CODE:

1.Setting Botton play music 1

clear sound;

clear plot;

[m1,Fs1]=audioread('C:\Users\陳楷元\Desktop\Kevin\學業\訊號與系統\MUSIC\music1.mp3');

Fs1=Fs1*app.SpeedSlider.Value;

m1=m1*app.VolumeSlider.Value;

time=(1:length(m1))/Fs1;

sound(m1,Fs1);

plot(app.UIAxes,time,m1);

xlabel(app.UIAxes,'Time(sec)');

ylabel(app.UIAxes,'Amp');

(Fourier transform)

yfft=length(m1);

yfft2=2^nextpow2(yfft);

f=fft(m1,yfft2);

plot(app.UIAxes2,abs(f),'r');

xlabel(app.UIAxes2,'Frequency(HZ)');

ylabel(app.UIAxes2,'Amp');

2.Setting Botton play music 2

clear sound;

clear plot;

[m2,Fs2]=audioread('C:\Users\陳楷元\Desktop\Kevin\學業\訊號與系統\MUSIC\music2.mp3');

Fs2=Fs2*app.SpeedSlider.Value;

m2=m2*app.VolumeSlider.Value;

time=(1:length(m2))/Fs2;

sound(m2,Fs2);

plot(app.UIAxes,time,m2);

xlabel(app.UIAxes2,'Time(sec)');

ylabel(app.UIAxes2,'Amp');

yfft=length(m2);

yfft2=2^nextpow2(yfft);

f=fft(m2,yfft2);

plot(app.UIAxes2,abs(f),'r');

xlabel(app.UIAxes2,'Frequency(HZ)');

ylabel(app.UIAxes2,'Amp');

3.Setting Botton stop

clear sound;

clear plot;