I need to reach datas on workspace

I have a listbox and I can add datas names to listbox and datas are sound files

I want to select an item on listbox and play it when I clicked a pushbutton.

[Adam Danz]

Is this in app designer / guide / or a custom GUI?

You'll need to add a callback function to your pushbutton. Within the callback function you'll need to access the list box and the current selection. Then you can use audioread() and sound() to read the sound file and play its content.

[Emre Akinci]

it is a custom gui

when I tried audioread() or sound() I am getting "argument" or "audio must be real or floating" error.

I am very amateur about guis

thank you for answer by the way

[Geoff Hayes]

Emre - please copy and paste your code to this question so that we can get an idea of what you have written. Also, please copy and paste the full error message.

[Emre Akinci]

I want to list my workspace items on listbox1. Items are wave sound files. When i added items to listbox1 I want to listen them by pushing listen_button

[Adam Danz]

"when I tried audioread() or sound() I am getting "argument" or "audio must be real or floating" error."

What we need is

1. the copy-pasted code where you tried audioread() and sound() (not a screen shot)
2. The full copy-pasted error message

We might need to audio file too but let's just start with those two things.

[Geoff Hayes]

emre - by I want to list my workspace items on listbox1 do you mean that you want to list some files from a particular directory/folder from your computer? Does the user get to choose the folder or are you hard-coding the path to these audio files?

[Emre Akinci]

Geoff Hayes - yes i mean that. User get choose files

that codes refreshing listbox1

and codes that starting with function is listen button I'm choosing item from listbox1.

It was easy when i did on command window but im new in gui design so what is wrong?

vars = evalin('base','who');
set(handles.listbox1,'String',vars);
--------------------------------------
function listenButton_Callback(hObject, eventdata, handles)
audio1 = audioread(get(handles.listbox1,'Value'));
sound(audio1,44100);

[Rik]

Not having read the whole thread I have two pieces of advice:

1 avoid evalin. You shouldn't need it. It looks like you want a function similar to dir.

2 the Value and String properties are separate. The way you retrieve the Value property looks like you actually mean to select the selected string. Check the code below.

function listenButton_Callback(hObject, eventdata, handles)
val=get(hObject,'Value');str=get(hObject,'String');
filename=str{val};
audio1 = audioread(filename);
sound(audio1,44100);
end

[Emre Akinci]

No appropriate method, property, or field

'listbox1' for class

'matlab.ui.control.UIControl'.

I got this error when i tried with hObject.listbox1

The filename specified was not found in the

MATLAB path.

this is second error that i got when i use with handles.listbox1

another advice? or what i did wrong?

[Rik]

hObject is already the handle to the object, no need to further edit that part of my code.

If you're using that syntax anyway you can also use the following code (which is equivalent to what I wrote in my prior comment).

function listenButton_Callback(hObject, eventdata, handles)
filename=hObject.String{hObject.Value}
audio1 = audioread(filename);
sound(audio1,44100);
end

[Emre Akinci]

Rik I added your codes without edit

and I got this

Cell contents reference from a non-cell array

object.

[Rik]

I missed the point that you were using this function as a callback to a button, not the listbox itself. So in that case you do need to specifically load the String and Value properties from the listbox instead of the button.

% this assumes handles.listbox1 is a handle to the listbox
% (which it is if you're using GUIDE to create this GUI)

function listenButton_Callback(hObject, eventdata, handles)
val=get(handles.listbox1,'Value');str=get(handles.listbox1,'String');
filename=str{val};
audio1 = audioread(filename);
sound(audio1,44100);
end

[Emre Akinci]

I am adding datas with manually,

I'm getting this error

The filename specified was not found in the MATLAB path.

and thats code when i try to list items in listbox

something is wrong with it?

vars = evalin('base','who');
set(handles.listbox1,'String',vars);

[Rik]

You shouldn't be using evalin. You should probably be using one or more of these functions: uigetdir, dir, and uigetfile.

[Emre Akinci]

thanks Rik!

I am very happy with that.

How can I thank you? :D

There is my working codes

function listenButton_Callback(hObject, eventdata, handles)
audio = get(handles.listbox1,'String');
file = get(handles.listbox1, 'Value');
audio1 = audioread(audio{file}); 
sound(audio1,fs);  % You can set fs by manual etc.:sound(audio1,44100);

function getFileButton_Callback(hObject, eventdata, handles)
% hObject    handle to yenileButton (see GCBO)
% eventdata  reserved - to be defined in a future version of MATLAB
% handles    structure with handles and user data (see GUIDATA)

sounds = uigetfile('*.wav','Choose one or more','MultiSelect', 'on');
set(handles.listbox1,'String',sounds);