Playing 3 different audio samples using 3 different buttons on GUI?

I have 3 different convolved signals which I would like to play out using 3 different buttons using callbacks using UI control. I have following code for creating the GUI and playing out the signals. When I press the first button, pushbutton1_Callback needs to play sound 1 and print "is working". In the commnad window, "is working" is printed but I get the following error message:

Undefined function or variable 'player1'.

Error in playaudio/playaudio/pushbutton1_Callback (line 95)

play(player1);

player1 = audioplayer(sig_conv_WB,fs);
player2 = audioplayer(sig_conv_HybIR_125,fs);
player3 = audioplayer(sig_conv_HybIR_250,fs);

this.wavebased = uicontrol(hfig,'style','push',...
    'position',[sl*0.35 sh*0.85 sl*0.3 sh*0.1],... %[sl*0.2 (sh/2)+(sh*0.2) sl*0.6 sh*0.1]
     'string','Wave Based','fontsize',16,...
     'callback',@pushbutton1_Callback);
 
this.hybrid125 = uicontrol(hfig,'style','push',...
    'position',[sl*0.35  sh*0.70 sl*0.3 sh*0.1  ],... %[sl*0.2 (sh/2)+(sh*0.2) sl*0.6 sh*0.1]
     'string','Hybrid 125','fontsize',16,...
     'callback',@pushbutton2_Callback);
 
this.hybrid250 = uicontrol(hfig,'style','push',...
    'position',[sl*0.35  sh*0.55 sl*0.3 sh*0.1  ],... %[sl*0.2 (sh/2)+(sh*0.2) sl*0.6 sh*0.1]
     'string','Hybrid 250','fontsize',16,...
     'callback',@pushbutton3_Callback);

 function pushbutton1_Callback(this, ~, ~)
             disp('is working')
             play(player1);
         end
         
         function pushbutton2_Callback(this, ~, ~)
             play(player2);
         end
         
         function pushbutton3_Callback(this, ~, ~)
             play(player3);
         end

Can someone help me solve this?

Answer 1

[David Hill]

You need to pass player1, player2, and player3 to your functions. One way is to make the functions part of an overall function.

function Start()
player1 = audioplayer(sig_conv_WB,fs);
player2 = audioplayer(sig_conv_HybIR_125,fs);
player3 = audioplayer(sig_conv_HybIR_250,fs);
hfig=figure;
sl=500;sh=300;
this.wavebased = uicontrol(hfig,'style','push',...
    'position',[sl*0.35 sh*0.85 sl*0.3 sh*0.1],... %[sl*0.2 (sh/2)+(sh*0.2) sl*0.6 sh*0.1]
     'string','Wave Based','fontsize',16,...
     'callback',@pushbutton1_Callback);
 
this.hybrid125 = uicontrol(hfig,'style','push',...
    'position',[sl*0.35  sh*0.70 sl*0.3 sh*0.1  ],... %[sl*0.2 (sh/2)+(sh*0.2) sl*0.6 sh*0.1]
     'string','Hybrid 125','fontsize',16,...
     'callback',@pushbutton2_Callback);
 
this.hybrid250 = uicontrol(hfig,'style','push',...
    'position',[sl*0.35  sh*0.55 sl*0.3 sh*0.1  ],... %[sl*0.2 (sh/2)+(sh*0.2) sl*0.6 sh*0.1]
     'string','Hybrid 250','fontsize',16,...
     'callback',@pushbutton3_Callback);
 function pushbutton1_Callback(this, ~, ~)
      display(player1);
 end
         
 function pushbutton2_Callback(this, ~, ~)
      display(player2);
 end
         
 function pushbutton3_Callback(this, ~, ~)
     display(player3);
 end
end

[Tanmayee Pathre]

Hello. Thanks for the answer. But it doesnt work. I get the following error message.

Undefined function or variable 'sig_conv_WB'.

Error in Start (line 2)

player1conv = audioplayer(sig_conv_WB,fs);

[David Hill]

Yep, need to pass your signals to the function

function Start(sig_conv_WB,sig_conv_HybIR_125,sig_conv_HybIR_250)