Playing a sequence of audio clips in the background after a delay

I would like to schedule a series of local audio tracks to play in sequence while my app is backgrounded or the device is locked, and after a delay. Furthermore, each track should only play a fixed duration sample. For example:

• User presses a button in my app.


• User locks device.


• After x minutes, tracks A, B, and C each play for y seconds in sequence.

How might I accomplish this?

My current Best Hope is to schedule these in an AVPlayerQueue since if I set up the queue correctly the background audio should then 'just work'. But I don't see any way to set a duration for each AVPlayerItem. I also don't know how to set an initial delay, though I would consider using looping a silent audio clip if that is the only obstacle.