http://www.korg.com/us/products/dj/kaossilator2s/

Integration with Ableton Live allows intuitive music production.
A palm-sized synthesizer.
The palm-sized synthesizer, kaossilator 2, has now been intensified. Announcing the newly evolved kaossilator 2S ("S" stands for Sound on Sound), a great tool for serious music production.

Use the touchpad to perform intuitively, the loop recorder to keep overdubbing, then export your recorded phrases to Ableton Live and polish them into a song! With undo/redo functions and support for exporting as multi-track data or in Ableton Live format, the kaossilator 2S means that serendipitous phrases and sudden ideas can be seamlessly used in song production.