If you're into creating your own beats you should check out FL Studio Groove. It's not really my thing but I ended up buying the app which is $4.99, word is it may go up in price, and it's totally worth it and made really well plus it works fairly well on RT too although it will rock on Pro. Highly suggest to go to the app site and check out the video, one is showing the app and another is a tutorial to get you started. The app does come within a few sample loops and mini songs.
FL Studio Groove
Sent from the SurfaceForums.net app for Windows 8
FL Studio Groove
Sent from the SurfaceForums.net app for Windows 8