title: Matlab volume control gui
body: <p>im trying to manipulate audio via volume slider, however I've been searching online and have not found any example. </p>
  
  <p>This is my code which display the slider number:</p>
  
  <pre><code>handles.volume=get(hObject,'Value');
  set(handles.vol_box,'String',num2str(handles.volume,'%2.f'));
  
  guidata(hObject, handles);
  </code></pre>
  
  <p>Could anyone one provide an example? </p>