How to use iPad as alarm with Boombox

[susja]

Hello,
Yesterday I've bought in Brookstone store Boombox. It plays very nice with my iPad. I'm just thinking how I could configure my iPad to work as an alarm clock. I do use app TuneIn ( radio app ) which has alarm inside hence I could start radio with alarm clock. But my question is ... how could I start iPad as alarm clock but play some music from my iPad?
Any ideas?
thanks