Pre-alarm for alarm clock

I'd love to see a pre-alarm option for alarms, i.e. a more gentle audio notification which won't wake you up when you're sound asleep, but is just enough to get your attention when you are half awake. Ideas for configuration options, sorted by (my personal) priority: * time offset for pre-alarm (how many minutes before the actual alarm time) * different sound for pre-alarm * custom volume for pre-alarm * repeat interval for pre-alarm (until actual alarm) * integrate media player (e.g. play music 30min before actual alarm) **EDIT:** moved alternative suggestion ([per-alarm settings](https://together.jolla.com/question/54055/clock-allow-different-settings-for-each-alarm/)) to a separate request, because it is more generic and would offer a viable workaround to configure a pre-alarm manually.