The midipad is a new application that could replace some of the widely used (multi-touch) MIDI controllers in the near future. The app can be used to control music-applications like Logic, Cubase/Nuendo, and Ableton Live with Apple's new iPad.
The great thing about this app is its ability to directly communicate via network-MIDI-protocol. It's all plug & play! No need to install software. Now you are able to control a Mac, PC and even standalone hardware-synths via WIFI :)
midipad incorporates various commonly used controller-types like buttons, trigger-pads, sliders, ribbon-control in one & two dimensions, rotary-knobs, or complete functionality blocks like transport-control.
The midipad app has five different preconfigured setups you can use called "views". Available views are studioview, launchview, djview, fxview and keysview. As a live-musician you can control sub-mixes of your virtual keyboard-rig, activate setups and change parameters of the virtual instruments or even hardware-instruments - all in realtime on stage.
If you are a DJ, you can control your favorite application wireless as well using the djview.
CreateDigitalMusic.com wrote an article in March about Midipad vs "the other multi-touch controllers" including Lemur and Stantum.
In case you have an iPhone but can't afford an iPad (yet), there's another MIDI controller that might be interested to check out. The app is called TouchOSC and it can also be used on a Wi-Fi network using the UDP protocol.
The midipad app for the Apple iPad is expected in May, 2010.
Midipad iPad App