As of today's 1.1 update, Native Instruments iMaschine, the beat sketchpad for iOS is now optimized for iPad, adapting to its larger screen layout. The update also includes a new set of factory samples, the ability to sample and edit tracks from your iTunes library, and a pair of XY pads for controlling effects.
Soundonsound.com, (2014). News - Native Instruments iMaschine optimised for iPad. [online] Available at: http://www.soundonsound.com/news?NewsID=17319 [Accessed 24 May. 2014].