I'm creating a timer in C#. When the timer finishes the user will get a notification.
If my app is gets suspended, I schedule a notification with the
<audio src='ms-winsoundevent:Notification.Looping.Alarm10' loop='true'/>
I've created a demo to reproduce the problem and found that you can use the internal sound directly by using
BackgroundMediaPlayer.Current.SetUriSource(new Uri("ms-winsoundevent:Notification.Looping.Alarm10")); BackgroundMediaPlayer.Current.Play();
It worked in my UWP Project. I hope it will work in your Project too.