The TRITON taktile 49-Key USB Controller and Synthesizer from Korg is a USB MIDI controller that features 512 sounds from Korg's TRITON synthesizer's sound engine built-in, allowing you to use the device both as a controller and sound module. Its controls include its 49-key semi-weighted keyboard, an integrated KAOSS pad that allows you to play melodies with a single finger as well as create and change phrase generation. The 16 pads can be used for triggering drum sounds as well as generating chords in various keys and scales.
You can further tweak the built-in sounds with its arpeggiator, which offers multiple rhythm patterns in addition to Touch Scale and Chord Scale functions. The controller is compatible with Mac, Windows, and iOS devices such as the iPad.