Matlab Piano

Hello. I am a freshman student at mechanical engineering. I try to make a piano on matlab gui for final project but I don't know how I make exactly. Only keybord is enough for my project but I need help. I will appreciate if you help me. Thank you in advance.

[Walter Roberson]

Whom is this addressed to?

Are you asking about how to make the GUI, or about how to interface a MIDI keyboard, or about how to do sound synthesis in MATLAB?

[hckfb]

I ask how to interface a MIDI keyboard and how to do sound synthesis in MATLAB

[Jan]

MIDI?! You asked for a GUI ask keyboard at first. MIDI is another story.

[hckfb]

http://www.mathworks.com/matlabcentral/fileexchange/21262-matlab-piano

I need same thing but it not needed to complex

Answer 1

[Jan]

As I've answered in your former question: If you ask Google, you find some very well implementations of piano keyboards in Matlab. You can also search in the FileExchange pages.

I did not post the links directly, to give you a chance to find them by your own.

[hckfb]

I have already done. There are a few piano but I don't understand exactly. There are only m-file and I don't understand which button is correspond which callback so I don't understand how my piano play sound.

[Jan]

What exactly is your question?

[hckfb]

I want make a matlab gui but I don't know what I write to callback

[Walter Roberson]

If you are using GUIDE, the callback function will be created automatically and you will merely (!) need to add the calls to the sound synthesis routines to those callbacks.

If you are not using GUIDE, then when you create the uicontrol, specify the name of a routine in the 'Callback' parameter, such as

blackkey5 = uicontrol('Style','pushbutton','Callback', {@keypushed,'b5'}, 'Position', [....]);

and

function keypushed(src, evt, keyid)

[...]

end

[hckfb]

I using guide. Yes, the callback function will be created automatically but I don't know what I add the calls to the sound synthesis routines to those callbacks.

Thank you.

[Walter Roberson]

You could start by creating the GUI and setting the callbacks to things like

pianokey(w11)

and have

function pianokey(keyid)

keyname = keyname(keyid);

note = keynote(keyid);

fprintf(1, 'Pressed key #%d, %s, note %s\n', keyid, keyname, note);

end

This will allow you to get your GUI all nicely arranged and will allow you to test the callbacks to be sure that each pushbutton connects to the proper note.

(You would have to build the keyname() and keynote() functions.)

[hckfb]

http://www.mathworks.com/matlabcentral/fileexchange/21262-matlab-piano

I need same thing but it not needed to complex

[Walter Roberson]

Might as well start with your GUI, and use dummy callback routines like I show above.

Sound synthesis is not a small topic; if you want to do it, you will need to research it and figure out what you want to implement. Keeping in mind, of course, that imitating force or velocity sensitive keys, or even just figuring out when a key is released, is going to require some cleverness on your part.

Answer 2

[Walter Roberson]

MIDI: see

http://www.mathworks.com/matlabcentral/fileexchange/27470-midi-tools

http://www.mathworks.com/matlabcentral/linkexchange/links/2774-midi-toolbox

Sound synthesis: see

http://www.mathworks.com/support/books/book49107.html

http://www.mathworks.com/matlabcentral/fileexchange/23526

http://www.mat.ucsb.edu/~b.sturm/SSUM/docs/SSUM.htm

[hckfb]

http://www.mathworks.com/matlabcentral/fileexchange/21262-matlab-piano

I need same thing but it not needed to complex

[Jan]

It is *your* final project. Therefore it is *your* turn, to simplify the program.