Yamaha Faders is a Core MIDI application that controls external MIDI devices by sending MIDI CC messages from your iOS device.
Faders features 4 sliders each with up to 3 control change parameters that can be assigned for each of 50 Templates.
Pricing and Availability
Faders is available now for free.
Link:More From: YAMAHA
Updates on the Komplex Sequencer and nice little explanation
002R non-keyboard rackmount version of the 002 is available with 8 or 12 voices