xyTar

XYtar is a simple MIDI music controller that accepts MIDI notes going into the iPhone or iPad.

XYtar is a limited version of the iTar app intended to support the XYPad only.

Play any notes on your MIDI keyboard or other controller and tap the XY Pad to trigger the notes. Move your fingers around the XY surface to apply MIDI sound effects like pitch-bending and modulations.

There's a basic edit screen to change those MIDI "ContinuousController" settings to your needs. To access, double-tap on lower left corner of screen.