Sound indicator that the book is about to be auto-paused

When using the sleep timer to auto-pause the book after a set time, it would be nice to get some clue that it’s about to pause.

I’ve seen two options for this:

1. Start drastically lowering the volume just before it’s paused

2. Play a “pling” sound a some time before it’s paused

I prefer the 2nd option. The implementation I’ve seen plays a sound (adjustable volume) ~30 seconds before it pauses, and another one ~5 seconds before it pauses (I guess this could also be adjustable). This allows me to postpone the pause without breaking the stream of content.

The implementation I’ve seen of the 1st option rewinds the book to when it started lowering the volume so it sometimes unnecessarily repeats parts of the book. It’s also sometimes hard to grasp if the volume is lowered because it’s about to pause or if the narrator lowers their voice because of the context in the book. If there is a bit of a longer pause in the book, we get even less time to notice is if it’s about to pause or not which sometimes makes me think “was the book paused now or is it just the narrator?”.