private void playFile(string audioFileName)
 {
     hotkeys = Hotkey.Create(settings.generalSettings.AppPush2TalkKey);
     AudioPlayer
     .OnPlay(() => { hotkeys.BroadcastDown(); })
     .OnPlayStopped(() =>
     {
         if (settings.generalSettings.IsAppPush2Talk)
         {
             Task.Run(async() =>
             {
                 await Task.Delay(settings.generalSettings.KeyUpDelay);
                 hotkeys.BroadcastUp();
             });
         }
     })
     .Play(audioFileName, settings.generalSettings.AudioOutDevice);
 }