No Backup Alarm, No Snooze. Just a timeout

I just want to play a “song” at certain times, and only once, so I don’t want Snooze, or a Backup Alarm, but I don’t seem to be able to do that. I disabled Snooze, but it still auto-Snoozes for 10 minutes after the (silent) Backup Alarm plays, and starts to play the song all over again.

How to do this?