echo $nano->show_audio_file($is_nano);
     break;
 case 'delete':
     $return = $nano->delete_files();
     if ($return == 1) {
         //cant' do this because the post that nano send doesnt take into account the session
         Display::display_confirmation_message(get_lang('FileDeleted'));
     } else {
         Display::display_confirmation_message(get_lang('FileNotFound'));
     }
     break;
 case 'show_form':
     api_protect_course_script(true);
     Display::display_reduced_header();
     echo $nano->return_js($_REQUEST);
     echo $nano->return_form();
     break;
 case 'save_file':
     //User access same as upload.php
     $return = $nano->upload_file($is_nano);
     if ($is_nano) {
         //nano looks for numbers
         if ($return == 1) {
             //cant' do this because the post that nano send doesnt take into account the session
             echo 1;
             //Display::display_confirmation_message(get_lang('UplUploadSucceeded'));
         } else {
             echo 0;
             //Display::display_warning_message(get_lang('UplUnableToSaveFileFilteredExtension'));
         }
     } else {