Midterm Presentation

Music Player

Introduction: By designing a simple music player with Matlab GUI, I get to learn more about coding and the processing of audio signal.

Code & Files

User Interface: You can add a song from the computer and it will show the song name and its sound wave then you can play/pause/resume playing your song just like any music player, and while you enjoying the music, if there's some adjustment you'd like to make, you can always easily control the speed and volume with the slide bars.

Code:

Add a song, show the name and its sound wave.

function pushbutton4_Callback(hObject, eventdata, handles)

[filename, filepath] = uigetfile('*.mp3');

[fullpath] = [filepath filename];

handles.data = audioread([fullpath]);

handles.path = [fullpath];

set(handles.edit1,'string',filename);

axes(handles.axes1);

plot(handles.data);

guidata(hObject,handles);

Play music.

function pushbutton1_Callback(hObject, eventdata, handles)

handles.player = audioplayer(handles.data, 44100)

play(handles.player);

guidata(hObject,handles);

Pause music.

function pushbutton2_Callback(hObject, eventdata, handles)

pause(handles.player);

guidata(hObject,handles);

Resume playing.

function pushbutton3_Callback(hObject, eventdata, handles)

resume(handles.player);

guidata(hObject,handles);

Show the value of the slide bar.

function slider5_Callback(hObject, eventdata, handles)

slider_value = get(handles.slider5, 'Value');

set(handles.edit6,'String',slider_value);

High pass filter.

fs=48000;

n=1;

cutOffFreq=1000;

[b,a]=butter(n,cutOffFreq/(fs/2),'High');

handles.data = filter(b,a,handles.data);

axes(handles.axes2);

plot(handles.data);

guidata(hObject,handles);

Low pass filter.

fs=48000;

n=6;

cutOffFreq=1000;

[b,a]=butter(n,cutOffFreq/(fs/2),'low');

handles.data = filter(b,a,handles.data);

axes(handles.axes3);

plot(handles.data);

guidata(hObject,handles);

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