Custom audio for toast notification is not working for desktop bridge application

[AmolGuldagad]

Custom audio for toast notification is not working for desktop bridge application

• We have desktop bridge app

• Trying to set custom audio for toast notification
  `
  ToastContent toastContent = new ToastContent()

        {
            Visual = new ToastVisual()
            {
                BindingGeneric = new ToastBindingGeneric()
                {
                    Children =
                    {
                        new AdaptiveText()
                        {
                            Text = title
                        }
                    }
                }
            }
        };
  toastContent.Audio = new ToastAudio()
  {
      Src = new Uri("ms-appx:///Assets/Audio/sound.m4a")
  };`
  

• we tried with more options with creating URI object like below:
  `Src = new Uri("ms-appx:///Asset/sound.wav")

  Src = new Uri(@"ms-appx:///Asset/sound.wav")

  Src = new Uri("ms-appx:///xx/Asset/sound.wav")
  Src = new Uri("pack://application:,,,/LibraryName;component/Asset/sound.wav")
  Src = new Uri("pack://application:,,,/Asset/sound.wav")
  Src = new Uri("ms-appdata:///local/sound.wav")
  Src = new Uri("ms-appdata:///temp/sound.wav")
  Src = new Uri(@"C:\Final\sound.wav")
  Src = new Uri("ms-appdata:///local/sound.wav")
  Src = new Uri($"pack://ms-appx:///Asset/sound.wav")`

with all options - its not working
Also we tried with creating Appx package with above URI but still same problem.
We are getting default sound or invalid URI errors

Note: It works properly with core UWP application